The paper presents the results of calculations of the elastoplastic deformation of the target using two variants of the decomposition of the total stress tensors into parts, corresponding to the volume strain and shear strain. The processes of elastoplastic deformation of a target made of a single-crystal VZhM8 alloy under shock loading by a steel projectile are simulated. The influence on the results of numerical simulation of the application of two variants of the decomposition of the total stress tensors for the target of a single-crystal alloy VZhM8, possessing auxeticity in the direction of loading, is shown.The paper presents the results of calculations of the elastoplastic deformation of the target using two variants of the decomposition of the total stress tensors into parts, corresponding to the volume strain and shear strain. The processes of elastoplastic deformation of a target made of a single-crystal VZhM8 alloy under shock loading by a steel projectile are simulated. The influence on the results of numerical simulation of the application of two variants of the decomposition of the total stress tensors for the target of a single-crystal alloy VZhM8, possessing auxeticity in the direction of loading, is shown.
{"title":"Options of decomposition of tensors of full stresses in modeling the processes of elastic-plastic deformation of auxetic media with cubic symmetry of properties","authors":"M. Krivosheina, E. Tuch, S. Kobenko","doi":"10.1063/1.5132050","DOIUrl":"https://doi.org/10.1063/1.5132050","url":null,"abstract":"The paper presents the results of calculations of the elastoplastic deformation of the target using two variants of the decomposition of the total stress tensors into parts, corresponding to the volume strain and shear strain. The processes of elastoplastic deformation of a target made of a single-crystal VZhM8 alloy under shock loading by a steel projectile are simulated. The influence on the results of numerical simulation of the application of two variants of the decomposition of the total stress tensors for the target of a single-crystal alloy VZhM8, possessing auxeticity in the direction of loading, is shown.The paper presents the results of calculations of the elastoplastic deformation of the target using two variants of the decomposition of the total stress tensors into parts, corresponding to the volume strain and shear strain. The processes of elastoplastic deformation of a target made of a single-crystal VZhM8 alloy under shock loading by a steel projectile are simulated. The influence on the results of numerical simulation of the application of two variants of the decomposition of the total stress tensors for the target of a single-crystal alloy VZhM8, possessing auxeticity in the direction of loading, is shown.","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91537546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The regularities of defect formation in polymetallic materials of various systems obtained by the method of electron-beam additive technology with the process parameters variation from the optimal values are investigated. It is revealed that depending on the material selected for the metal and alloy samples formation there is nucleation of defects which differ in structure and influence on mechanical properties. In the samples from the pair of metals with high solubility in the solid state and the ability to form intermetallic compounds, determined by the state diagram, the defects are formed in the form of cracks and stratifications. Samples of all systems can form heterogeneous distribution of the system components due to irregularity of wire filament feeding, filament underheating or substrate overheating.
{"title":"Regularities of defect formation at additive electron-beam manufacturing of polymetallic samples","authors":"A. Gusarova, E. Khoroshko","doi":"10.1063/1.5132004","DOIUrl":"https://doi.org/10.1063/1.5132004","url":null,"abstract":"The regularities of defect formation in polymetallic materials of various systems obtained by the method of electron-beam additive technology with the process parameters variation from the optimal values are investigated. It is revealed that depending on the material selected for the metal and alloy samples formation there is nucleation of defects which differ in structure and influence on mechanical properties. In the samples from the pair of metals with high solubility in the solid state and the ability to form intermetallic compounds, determined by the state diagram, the defects are formed in the form of cracks and stratifications. Samples of all systems can form heterogeneous distribution of the system components due to irregularity of wire filament feeding, filament underheating or substrate overheating.","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88592862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Putilova, S. Zadvorkin, E. S. Gorkunov, I. Veselov, I. Pyshmintsev
The paper presents the results of the study of microstructure, mechanical and corrosion properties of the promising high-strength economically alloyed Fe-Cr-Mo steel, designed for the production of the oil country tubular goods (OCTG): casing and tubing. The main qualifying standards for this steel are to provide simultaneous increase of strength and resistance to sulfide stress cracking (SSC). It was shown that these requirements could be achieved by a special heat treatment, which results in the formation of a secondary sorbite structure with a lower dislocation density and dispersion-strengthened V, Nb carbides.The paper presents the results of the study of microstructure, mechanical and corrosion properties of the promising high-strength economically alloyed Fe-Cr-Mo steel, designed for the production of the oil country tubular goods (OCTG): casing and tubing. The main qualifying standards for this steel are to provide simultaneous increase of strength and resistance to sulfide stress cracking (SSC). It was shown that these requirements could be achieved by a special heat treatment, which results in the formation of a secondary sorbite structure with a lower dislocation density and dispersion-strengthened V, Nb carbides.
{"title":"Investigation of structure and properties of low-carbon low-alloyed Cr-Mo pipe steel intended for operating in sour environment","authors":"E. Putilova, S. Zadvorkin, E. S. Gorkunov, I. Veselov, I. Pyshmintsev","doi":"10.1063/1.5132158","DOIUrl":"https://doi.org/10.1063/1.5132158","url":null,"abstract":"The paper presents the results of the study of microstructure, mechanical and corrosion properties of the promising high-strength economically alloyed Fe-Cr-Mo steel, designed for the production of the oil country tubular goods (OCTG): casing and tubing. The main qualifying standards for this steel are to provide simultaneous increase of strength and resistance to sulfide stress cracking (SSC). It was shown that these requirements could be achieved by a special heat treatment, which results in the formation of a secondary sorbite structure with a lower dislocation density and dispersion-strengthened V, Nb carbides.The paper presents the results of the study of microstructure, mechanical and corrosion properties of the promising high-strength economically alloyed Fe-Cr-Mo steel, designed for the production of the oil country tubular goods (OCTG): casing and tubing. The main qualifying standards for this steel are to provide simultaneous increase of strength and resistance to sulfide stress cracking (SSC). It was shown that these requirements could be achieved by a special heat treatment, which results in the formation of a secondary sorbite structure with a lower dislocation density and dispersion-strengthened V, Nb carbides.","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86976503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Vlasov, N. Surikova, I. Mishin, S. Panin, A. Smirnova, A. Yakovlev, R. Stankevich
Studies on the impact of helical rolling on the structure and mechanical properties of 09Mn2Si pipe steel have been carried out. With the use of transmission electron microscopy it was revealed that the helical rolling gives rise to refinement of ferrite grains as well as fracture of cementite plates within the pearlite phase. This is particularly evident in the surface layer where the degree of strain resulting from the rolling achieved the maximum value. Microhardness measurements have confirmed gradient hardening pattern over the cross section of a rod being induced during the rolling. It is concluded that the most manifested increase of the microhardness takes place at the depth of up to 3 mm. Mechanical properties of the treated steel was estimated under static tension tests. It is shown that helical rolling of 09Mn2Si steel gives rise to increasing of the flow stress (at the yield plateau) and the proportionality limit, while the value of relative elongation has decreased. At the same time, despite of the strengthening induced by the helical rolling the strain hardening takes place in the steel. The latter is manifested through the parabolic hardening at the loading diagram followed by a gradual decrease in the flow stress after the neck formation.Studies on the impact of helical rolling on the structure and mechanical properties of 09Mn2Si pipe steel have been carried out. With the use of transmission electron microscopy it was revealed that the helical rolling gives rise to refinement of ferrite grains as well as fracture of cementite plates within the pearlite phase. This is particularly evident in the surface layer where the degree of strain resulting from the rolling achieved the maximum value. Microhardness measurements have confirmed gradient hardening pattern over the cross section of a rod being induced during the rolling. It is concluded that the most manifested increase of the microhardness takes place at the depth of up to 3 mm. Mechanical properties of the treated steel was estimated under static tension tests. It is shown that helical rolling of 09Mn2Si steel gives rise to increasing of the flow stress (at the yield plateau) and the proportionality limit, while the value of relative elongation has decreased. At the same time, despite ...
{"title":"Modification of structure and mechanical properties of 09Mn2Si pipe steel by helical rolling","authors":"I. Vlasov, N. Surikova, I. Mishin, S. Panin, A. Smirnova, A. Yakovlev, R. Stankevich","doi":"10.1063/1.5132251","DOIUrl":"https://doi.org/10.1063/1.5132251","url":null,"abstract":"Studies on the impact of helical rolling on the structure and mechanical properties of 09Mn2Si pipe steel have been carried out. With the use of transmission electron microscopy it was revealed that the helical rolling gives rise to refinement of ferrite grains as well as fracture of cementite plates within the pearlite phase. This is particularly evident in the surface layer where the degree of strain resulting from the rolling achieved the maximum value. Microhardness measurements have confirmed gradient hardening pattern over the cross section of a rod being induced during the rolling. It is concluded that the most manifested increase of the microhardness takes place at the depth of up to 3 mm. Mechanical properties of the treated steel was estimated under static tension tests. It is shown that helical rolling of 09Mn2Si steel gives rise to increasing of the flow stress (at the yield plateau) and the proportionality limit, while the value of relative elongation has decreased. At the same time, despite of the strengthening induced by the helical rolling the strain hardening takes place in the steel. The latter is manifested through the parabolic hardening at the loading diagram followed by a gradual decrease in the flow stress after the neck formation.Studies on the impact of helical rolling on the structure and mechanical properties of 09Mn2Si pipe steel have been carried out. With the use of transmission electron microscopy it was revealed that the helical rolling gives rise to refinement of ferrite grains as well as fracture of cementite plates within the pearlite phase. This is particularly evident in the surface layer where the degree of strain resulting from the rolling achieved the maximum value. Microhardness measurements have confirmed gradient hardening pattern over the cross section of a rod being induced during the rolling. It is concluded that the most manifested increase of the microhardness takes place at the depth of up to 3 mm. Mechanical properties of the treated steel was estimated under static tension tests. It is shown that helical rolling of 09Mn2Si steel gives rise to increasing of the flow stress (at the yield plateau) and the proportionality limit, while the value of relative elongation has decreased. At the same time, despite ...","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82535783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Osipov, I. Smirnov, K. V. Grinyaev, V. Melnikov, M. Korchagin, I. Ditenberg
Using scanning electron microscopy (EBSD analysis) and microindentation, we studied the features of the grain structure and the microhardness level of Ni3Al samples after synthesis and annealing at different temperatures. The effects of the duration of preliminary mechanical activation on the microstructure and microhardness of the intermetallic samples were revealed both after spark plasma sintering and subsequent heat treatments.Using scanning electron microscopy (EBSD analysis) and microindentation, we studied the features of the grain structure and the microhardness level of Ni3Al samples after synthesis and annealing at different temperatures. The effects of the duration of preliminary mechanical activation on the microstructure and microhardness of the intermetallic samples were revealed both after spark plasma sintering and subsequent heat treatments.
{"title":"Thermal stability of microstructure and microhardness of Ni3Al samples with different duration of preliminary mechanical activation","authors":"D. Osipov, I. Smirnov, K. V. Grinyaev, V. Melnikov, M. Korchagin, I. Ditenberg","doi":"10.1063/1.5132120","DOIUrl":"https://doi.org/10.1063/1.5132120","url":null,"abstract":"Using scanning electron microscopy (EBSD analysis) and microindentation, we studied the features of the grain structure and the microhardness level of Ni3Al samples after synthesis and annealing at different temperatures. The effects of the duration of preliminary mechanical activation on the microstructure and microhardness of the intermetallic samples were revealed both after spark plasma sintering and subsequent heat treatments.Using scanning electron microscopy (EBSD analysis) and microindentation, we studied the features of the grain structure and the microhardness level of Ni3Al samples after synthesis and annealing at different temperatures. The effects of the duration of preliminary mechanical activation on the microstructure and microhardness of the intermetallic samples were revealed both after spark plasma sintering and subsequent heat treatments.","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80161187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The dependence of the localized plasticity autowaves on the Debye parameter (Debye temperature) has been analyzed for nineteen different metals. Characteristics of autowaves are determined using speckle photography method. It is shown that this experimentally established linear relationship is a consequence of the previously introduced elasto-plastic deformation invariant, which connects parameters of elastic and plastic processes in a deformable medium.The dependence of the localized plasticity autowaves on the Debye parameter (Debye temperature) has been analyzed for nineteen different metals. Characteristics of autowaves are determined using speckle photography method. It is shown that this experimentally established linear relationship is a consequence of the previously introduced elasto-plastic deformation invariant, which connects parameters of elastic and plastic processes in a deformable medium.
{"title":"Correlation characteristics of autowave of localized plastic deformation and parameters of interatomic interactions","authors":"L. Zuev, S. Barannikova, A. M. Zharmukhambetova","doi":"10.1063/1.5132277","DOIUrl":"https://doi.org/10.1063/1.5132277","url":null,"abstract":"The dependence of the localized plasticity autowaves on the Debye parameter (Debye temperature) has been analyzed for nineteen different metals. Characteristics of autowaves are determined using speckle photography method. It is shown that this experimentally established linear relationship is a consequence of the previously introduced elasto-plastic deformation invariant, which connects parameters of elastic and plastic processes in a deformable medium.The dependence of the localized plasticity autowaves on the Debye parameter (Debye temperature) has been analyzed for nineteen different metals. Characteristics of autowaves are determined using speckle photography method. It is shown that this experimentally established linear relationship is a consequence of the previously introduced elasto-plastic deformation invariant, which connects parameters of elastic and plastic processes in a deformable medium.","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86642503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper deals with the investigation of ultrasonic impact post-build treatment of SLM-manufactured Ti-6Al-4V. SLM blanks were cut along building direction and subjected to ultrasonic impact surface treatment. Post-build treated specimens were tested by uniaxial tensile testing with in situ strain monitoring via digital image correlation technique (DIC), while the fracture surfaces were studied by scanning electron microscopy (SEM). The analysis of the experimental data allowed revealing the effect of post-build treatment on mechanical properties and on the peculiarities of deformation behavior. Analysis of SEM images of fracture surfaces allowed us to distinguish the differences between structure influence onto failure pattern both for the treated and non-treated specimens.The paper deals with the investigation of ultrasonic impact post-build treatment of SLM-manufactured Ti-6Al-4V. SLM blanks were cut along building direction and subjected to ultrasonic impact surface treatment. Post-build treated specimens were tested by uniaxial tensile testing with in situ strain monitoring via digital image correlation technique (DIC), while the fracture surfaces were studied by scanning electron microscopy (SEM). The analysis of the experimental data allowed revealing the effect of post-build treatment on mechanical properties and on the peculiarities of deformation behavior. Analysis of SEM images of fracture surfaces allowed us to distinguish the differences between structure influence onto failure pattern both for the treated and non-treated specimens.
{"title":"Static fracture behavior of ultrasonic impact post-built treated SLM-manufactured Ti-6Al-4V","authors":"M. Burkov, A. Eremin, A. Byakov, S. Panin","doi":"10.1063/1.5131908","DOIUrl":"https://doi.org/10.1063/1.5131908","url":null,"abstract":"The paper deals with the investigation of ultrasonic impact post-build treatment of SLM-manufactured Ti-6Al-4V. SLM blanks were cut along building direction and subjected to ultrasonic impact surface treatment. Post-build treated specimens were tested by uniaxial tensile testing with in situ strain monitoring via digital image correlation technique (DIC), while the fracture surfaces were studied by scanning electron microscopy (SEM). The analysis of the experimental data allowed revealing the effect of post-build treatment on mechanical properties and on the peculiarities of deformation behavior. Analysis of SEM images of fracture surfaces allowed us to distinguish the differences between structure influence onto failure pattern both for the treated and non-treated specimens.The paper deals with the investigation of ultrasonic impact post-build treatment of SLM-manufactured Ti-6Al-4V. SLM blanks were cut along building direction and subjected to ultrasonic impact surface treatment. Post-build treated specimens were tested by uniaxial tensile testing with in situ strain monitoring via digital image correlation technique (DIC), while the fracture surfaces were studied by scanning electron microscopy (SEM). The analysis of the experimental data allowed revealing the effect of post-build treatment on mechanical properties and on the peculiarities of deformation behavior. Analysis of SEM images of fracture surfaces allowed us to distinguish the differences between structure influence onto failure pattern both for the treated and non-treated specimens.","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88014318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Vlasov, N. Surikova, I. Mishin, S. Panin, A. Smirnova, A. Yakovlev
Effect of structure modification induced by the helical rolling on the impact toughness of 09Mn2Si steel was studied. A metallographic structural analysis of the steel in the as-received state as well as after the helical rolling (HR) was carried out. It was revealed that the five-stage combined thermal-mechanical treatment results in ferrite grains refinement, formation of rolling texture at the depth of up to 1 mm, while ultrafine grained structure is formed in the surface layer. This is accompanied by a gradient hardening pattern over the rod’s cross-section as evidenced from microhardness measurements. Mechanical properties were assessed through impact bending tests. It is shown that helical rolling gives rise to increasing fracture toughness of the rolled specimens in the entire testing temperature range (-70 ÷ +20 °C). The maximum two-fold increase of impact toughness is registered at the testing temperature of -70 °C. Authors suggest that the main reason for this increase is formation of a gradient...
{"title":"Regularities of structure modification of 09Mn2Si steel rod at helical rolling and its influence on impact toughness","authors":"I. Vlasov, N. Surikova, I. Mishin, S. Panin, A. Smirnova, A. Yakovlev","doi":"10.1063/1.5132250","DOIUrl":"https://doi.org/10.1063/1.5132250","url":null,"abstract":"Effect of structure modification induced by the helical rolling on the impact toughness of 09Mn2Si steel was studied. A metallographic structural analysis of the steel in the as-received state as well as after the helical rolling (HR) was carried out. It was revealed that the five-stage combined thermal-mechanical treatment results in ferrite grains refinement, formation of rolling texture at the depth of up to 1 mm, while ultrafine grained structure is formed in the surface layer. This is accompanied by a gradient hardening pattern over the rod’s cross-section as evidenced from microhardness measurements. Mechanical properties were assessed through impact bending tests. It is shown that helical rolling gives rise to increasing fracture toughness of the rolled specimens in the entire testing temperature range (-70 ÷ +20 °C). The maximum two-fold increase of impact toughness is registered at the testing temperature of -70 °C. Authors suggest that the main reason for this increase is formation of a gradient...","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90733586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this work studies of the alloys sintered by powder metallurgy method are presented. Samples were obtained from mixtures of powders Fe and Ni (30–40 wt % Ni) after ball-mill treatment, cold pressing and sintered in a vacuum furnace. It has been shown that the face centered cubic and body centered cubic (no more than 5%) alloys are formed at sintering of powders mixture. The lattice parameter of the γ-phase depends on content of Ni and increases from 3.585×10−10 to 3.596−10 m, these lattice parameters correspond to well-known invar alloys. The hardness of sintered samples changes from 0.8 to 1.5 GPa, the Young’s modulus changes from 83 to 126 GPa that correspond to values obtained for invar alloy in literature. The coefficient of thermal expansion is 1.1×10−6°С−1 for interval 0–150°С and is 15.8 × 10−6°С–1 for interval 300–500°С and this change corresponds to magnetic transformation at 225°С. So, alloys obtained by sintering of powders Fe and Ni are formed as invar alloy and its properties are typical of cast alloys.In this work studies of the alloys sintered by powder metallurgy method are presented. Samples were obtained from mixtures of powders Fe and Ni (30–40 wt % Ni) after ball-mill treatment, cold pressing and sintered in a vacuum furnace. It has been shown that the face centered cubic and body centered cubic (no more than 5%) alloys are formed at sintering of powders mixture. The lattice parameter of the γ-phase depends on content of Ni and increases from 3.585×10−10 to 3.596−10 m, these lattice parameters correspond to well-known invar alloys. The hardness of sintered samples changes from 0.8 to 1.5 GPa, the Young’s modulus changes from 83 to 126 GPa that correspond to values obtained for invar alloy in literature. The coefficient of thermal expansion is 1.1×10−6°С−1 for interval 0–150°С and is 15.8 × 10−6°С–1 for interval 300–500°С and this change corresponds to magnetic transformation at 225°С. So, alloys obtained by sintering of powders Fe and Ni are formed as invar alloy and its properties are typical of...
{"title":"Studies of invar alloys sintered from powders mixtures","authors":"E. Abdulmenova, V. Kashirina, S. Kulkov","doi":"10.1063/1.5131869","DOIUrl":"https://doi.org/10.1063/1.5131869","url":null,"abstract":"In this work studies of the alloys sintered by powder metallurgy method are presented. Samples were obtained from mixtures of powders Fe and Ni (30–40 wt % Ni) after ball-mill treatment, cold pressing and sintered in a vacuum furnace. It has been shown that the face centered cubic and body centered cubic (no more than 5%) alloys are formed at sintering of powders mixture. The lattice parameter of the γ-phase depends on content of Ni and increases from 3.585×10−10 to 3.596−10 m, these lattice parameters correspond to well-known invar alloys. The hardness of sintered samples changes from 0.8 to 1.5 GPa, the Young’s modulus changes from 83 to 126 GPa that correspond to values obtained for invar alloy in literature. The coefficient of thermal expansion is 1.1×10−6°С−1 for interval 0–150°С and is 15.8 × 10−6°С–1 for interval 300–500°С and this change corresponds to magnetic transformation at 225°С. So, alloys obtained by sintering of powders Fe and Ni are formed as invar alloy and its properties are typical of cast alloys.In this work studies of the alloys sintered by powder metallurgy method are presented. Samples were obtained from mixtures of powders Fe and Ni (30–40 wt % Ni) after ball-mill treatment, cold pressing and sintered in a vacuum furnace. It has been shown that the face centered cubic and body centered cubic (no more than 5%) alloys are formed at sintering of powders mixture. The lattice parameter of the γ-phase depends on content of Ni and increases from 3.585×10−10 to 3.596−10 m, these lattice parameters correspond to well-known invar alloys. The hardness of sintered samples changes from 0.8 to 1.5 GPa, the Young’s modulus changes from 83 to 126 GPa that correspond to values obtained for invar alloy in literature. The coefficient of thermal expansion is 1.1×10−6°С−1 for interval 0–150°С and is 15.8 × 10−6°С–1 for interval 300–500°С and this change corresponds to magnetic transformation at 225°С. So, alloys obtained by sintering of powders Fe and Ni are formed as invar alloy and its properties are typical of...","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90879919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper presents the results on the investigation of the accumulation of plastic strain and damage in the sample of sheet metal from lightweight structural aluminum alloy during the process of severe plastic deformation, using numerical simulation. It is proposed to use the dynamic version of the groove pressing to realize the severe plastic deformation of flat samples. A groove die with a groove of trapezoidal form is considered here. The process of dynamic groove pressing was numerically investigated in a two-dimensional formulation under plane strain condition. The maximum value of the effective plastic strain develops in the stretching area of the material and reaches a value of 0.75. In the zone of interaction between the groove of the die and the sample, the highest values of the damage parameter are achieved.The paper presents the results on the investigation of the accumulation of plastic strain and damage in the sample of sheet metal from lightweight structural aluminum alloy during the process of severe plastic deformation, using numerical simulation. It is proposed to use the dynamic version of the groove pressing to realize the severe plastic deformation of flat samples. A groove die with a groove of trapezoidal form is considered here. The process of dynamic groove pressing was numerically investigated in a two-dimensional formulation under plane strain condition. The maximum value of the effective plastic strain develops in the stretching area of the material and reaches a value of 0.75. In the zone of interaction between the groove of the die and the sample, the highest values of the damage parameter are achieved.
{"title":"Numerical simulation of intensive plastic deformation in dynamic groove pressing","authors":"L. Akhmetshin","doi":"10.1063/1.5131873","DOIUrl":"https://doi.org/10.1063/1.5131873","url":null,"abstract":"The paper presents the results on the investigation of the accumulation of plastic strain and damage in the sample of sheet metal from lightweight structural aluminum alloy during the process of severe plastic deformation, using numerical simulation. It is proposed to use the dynamic version of the groove pressing to realize the severe plastic deformation of flat samples. A groove die with a groove of trapezoidal form is considered here. The process of dynamic groove pressing was numerically investigated in a two-dimensional formulation under plane strain condition. The maximum value of the effective plastic strain develops in the stretching area of the material and reaches a value of 0.75. In the zone of interaction between the groove of the die and the sample, the highest values of the damage parameter are achieved.The paper presents the results on the investigation of the accumulation of plastic strain and damage in the sample of sheet metal from lightweight structural aluminum alloy during the process of severe plastic deformation, using numerical simulation. It is proposed to use the dynamic version of the groove pressing to realize the severe plastic deformation of flat samples. A groove die with a groove of trapezoidal form is considered here. The process of dynamic groove pressing was numerically investigated in a two-dimensional formulation under plane strain condition. The maximum value of the effective plastic strain develops in the stretching area of the material and reaches a value of 0.75. In the zone of interaction between the groove of the die and the sample, the highest values of the damage parameter are achieved.","PeriodicalId":20637,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91327046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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