ABSTRACT Ti–0.3Mo–0.8Ni alloy has excellent corrosion resistance and is widely used in making crystallizers, heaters and evaporators for salt production, as well as chemical reactors and heat exchangers. To study the distribution of Mo in the Ti–0.3Mo–0.8Ni alloy during electron beam cold hearth melting, the solidification process has been numerically modelled and the calculations compared with experimental data. A distribution law similar to the calculated results is obtained, which verifies the reliability of the numerical modelling and provides theoretical guidance for the industrial production of Ti–0.3Mo–0.8Ni alloy. In addition, the experimental data indicates that the deviation of the Mo content in each end face and cross-section is within ±0.05%.
{"title":"Experimental verification of molybdenum segregation for large-scale slab ingots of Ti–0.3Mo–0.8Ni alloy during electron-beam cold-hearth melting","authors":"Zhenze Zhu, Zulai Li, Rongfeng Zhou, Hai-guang Huang, Wentao Xiong, Xiangming Li","doi":"10.1080/09500839.2022.2100935","DOIUrl":"https://doi.org/10.1080/09500839.2022.2100935","url":null,"abstract":"ABSTRACT Ti–0.3Mo–0.8Ni alloy has excellent corrosion resistance and is widely used in making crystallizers, heaters and evaporators for salt production, as well as chemical reactors and heat exchangers. To study the distribution of Mo in the Ti–0.3Mo–0.8Ni alloy during electron beam cold hearth melting, the solidification process has been numerically modelled and the calculations compared with experimental data. A distribution law similar to the calculated results is obtained, which verifies the reliability of the numerical modelling and provides theoretical guidance for the industrial production of Ti–0.3Mo–0.8Ni alloy. In addition, the experimental data indicates that the deviation of the Mo content in each end face and cross-section is within ±0.05%.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49230126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-13DOI: 10.1080/09500839.2022.2096267
I. M. Suslov
ABSTRACT
Resistance ρ of an one-dimensional disordered system of length L has the log-normal distribution in the limit of large L. Parameters of this distribution depend on the Fermi level position, but are independent on the boundary conditions. However, the boundary conditions essentially affect the distribution of phases entering the transfer matrix and generally change the parameters of the evolution equation for the distribution . This visible contradiction is resolved by the existence of the hidden symmetry, whose nature is revealed by the derivation of the equation for the stationary phase distribution and by analysis of its transformation properties.
{"title":"Hidden symmetry in 1D localisation","authors":"I. M. Suslov","doi":"10.1080/09500839.2022.2096267","DOIUrl":"https://doi.org/10.1080/09500839.2022.2096267","url":null,"abstract":"<p><b>ABSTRACT</b></p><p>Resistance <i>ρ</i> of an one-dimensional disordered system of length <i>L</i> has the log-normal distribution in the limit of large <i>L</i>. Parameters of this distribution depend on the Fermi level position, but are independent on the boundary conditions. However, the boundary conditions essentially affect the distribution of phases entering the transfer matrix and generally change the parameters of the evolution equation for the distribution <span><noscript><img alt=\"\" src=\"/na101/home/literatum/publisher/tandf/journals/content/tphl20/2022/tphl20.v102.i08-09/09500839.2022.2096267/20221101/images/tphl_a_2096267_ilm0001.gif\"/></noscript><img alt=\"\" data-formula-source='{\"type\" : \"image\", \"src\" : \"/na101/home/literatum/publisher/tandf/journals/content/tphl20/2022/tphl20.v102.i08-09/09500839.2022.2096267/20221101/images/tphl_a_2096267_ilm0001.gif\"}' src=\"//:0\"/><span></span></span><span><img alt=\"\" data-formula-source='{\"type\" : \"mathjax\"}' src=\"//:0\"/><math><mi>P</mi><mo>(</mo><mi>ρ</mi><mo>)</mo></math></span>. This visible contradiction is resolved by the existence of the hidden symmetry, whose nature is revealed by the derivation of the equation for the stationary phase distribution and by analysis of its transformation properties.</p>","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138520724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-20DOI: 10.1080/09500839.2022.2084571
Lei Lu, Chongzheng Na
ABSTRACT Adsorption is a physicochemical phenomenon important in both natural and engineering processes. In the research and practice of adsorption equilibrium, a long-standing challenge is how to reconcile the classical models proposed by Gibbs, Langmuir, Freundlich, and Temkin for interpreting experimentally obtained adsorption isotherms. Here, we show that the Langmuir, Freundlich, and Temkin isotherms can be derived from the Gibbs equation under different conditions for the change of surface energy (a.k.a. surface tension) by adsorption. When the change of surface energy is predominantly controlled by the change of chemical potential with negligible contribution from the change of internal energy and entropy, the Gibbs equation can be integrated to give the Langmuir isotherm. When changes of internal energy and entropy are no longer negligible, the integration of the Gibbs equation gives the Freundlich and Temkin equations, according to a change of surface energy either independent or linearly dependent on the adsorption capacity. These results indicate that the classical models share the common mechanism of phase equilibrium described by the Gibbsian thermodynamics, thereby providing novel insights for their application.
{"title":"Gibbsian interpretation of Langmuir, Freundlich and Temkin isotherms for adsorption in solution","authors":"Lei Lu, Chongzheng Na","doi":"10.1080/09500839.2022.2084571","DOIUrl":"https://doi.org/10.1080/09500839.2022.2084571","url":null,"abstract":"ABSTRACT Adsorption is a physicochemical phenomenon important in both natural and engineering processes. In the research and practice of adsorption equilibrium, a long-standing challenge is how to reconcile the classical models proposed by Gibbs, Langmuir, Freundlich, and Temkin for interpreting experimentally obtained adsorption isotherms. Here, we show that the Langmuir, Freundlich, and Temkin isotherms can be derived from the Gibbs equation under different conditions for the change of surface energy (a.k.a. surface tension) by adsorption. When the change of surface energy is predominantly controlled by the change of chemical potential with negligible contribution from the change of internal energy and entropy, the Gibbs equation can be integrated to give the Langmuir isotherm. When changes of internal energy and entropy are no longer negligible, the integration of the Gibbs equation gives the Freundlich and Temkin equations, according to a change of surface energy either independent or linearly dependent on the adsorption capacity. These results indicate that the classical models share the common mechanism of phase equilibrium described by the Gibbsian thermodynamics, thereby providing novel insights for their application.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44181689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT The hot compression of A-100 steel at 850–1150°C and strain rate of 0.01–10 s−1 was tested on a Gleeble-3800 thermal simulation machine to determine the corresponding true stress–strain curve. Based on theoretical calculation, the dislocation density factor was introduced into the Avrami equation and thereby a dynamic recovery physical constitutive relational model based on dislocation density theory was established. Then the hot deformation behaviour of A-100 steel was predicted (correlation coefficient R = 0.9964 with an average absolute relative error AARE = 4.0923%). The structures after hot compression were observed by electron backscattered diffraction and found to be lath-shaped martensite and austenite. With an increase of temperature and deceleration of strain rate, the proportions of large-angle boundaries and substructures increased and the softening mechanism became dominated by dynamic recovery.
{"title":"Physical constitutive relational model and structure evolution during dynamic recovery of 23Co14Ni12Cr3MoE (A-100) high-strength steel","authors":"Jinke Han, Jianlin Li, Yifan Zhang, Haoyu Zhang, Ge Zhou, Lijia Chen","doi":"10.1080/09500839.2022.2084570","DOIUrl":"https://doi.org/10.1080/09500839.2022.2084570","url":null,"abstract":"ABSTRACT The hot compression of A-100 steel at 850–1150°C and strain rate of 0.01–10 s−1 was tested on a Gleeble-3800 thermal simulation machine to determine the corresponding true stress–strain curve. Based on theoretical calculation, the dislocation density factor was introduced into the Avrami equation and thereby a dynamic recovery physical constitutive relational model based on dislocation density theory was established. Then the hot deformation behaviour of A-100 steel was predicted (correlation coefficient R = 0.9964 with an average absolute relative error AARE = 4.0923%). The structures after hot compression were observed by electron backscattered diffraction and found to be lath-shaped martensite and austenite. With an increase of temperature and deceleration of strain rate, the proportions of large-angle boundaries and substructures increased and the softening mechanism became dominated by dynamic recovery.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47635382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.1080/09500839.2022.2077999
Xinu Tan, R. Qiu, Yushun Liu, Fengxian Bi, Jinlong Zhang, Boran Tao, Qing Liu
ABSTRACT In contrast to lamella-like face-centered cubic zirconium (FCC-Zr) distributed inside an α-Zr matrix, as repeatedly reported previously, dispersed and nanoscale FCC-Zr with lattice parameter a = 0.520 nm has been found inside lamella-like and blocky ω-Zr by transmission electron microscopy (TEM). The orientation relationship between the FCC-Zr and the ω-Zr obeys [001]FCC//[1 02]ω, (100)FCC//(11 0)ω. A possible phase transformation mechanism between FCC-Zr, α-Zr and β-Zr is discussed. This finding introduces a new possibility in phase transformations during the fabrication of Zr alloys, potentially enlightening the design of new high-performance Zr alloys.
{"title":"Nanoscale face-centered-cubic zirconium dispersed in omega zirconium","authors":"Xinu Tan, R. Qiu, Yushun Liu, Fengxian Bi, Jinlong Zhang, Boran Tao, Qing Liu","doi":"10.1080/09500839.2022.2077999","DOIUrl":"https://doi.org/10.1080/09500839.2022.2077999","url":null,"abstract":"ABSTRACT In contrast to lamella-like face-centered cubic zirconium (FCC-Zr) distributed inside an α-Zr matrix, as repeatedly reported previously, dispersed and nanoscale FCC-Zr with lattice parameter a = 0.520 nm has been found inside lamella-like and blocky ω-Zr by transmission electron microscopy (TEM). The orientation relationship between the FCC-Zr and the ω-Zr obeys [001]FCC//[1 02]ω, (100)FCC//(11 0)ω. A possible phase transformation mechanism between FCC-Zr, α-Zr and β-Zr is discussed. This finding introduces a new possibility in phase transformations during the fabrication of Zr alloys, potentially enlightening the design of new high-performance Zr alloys.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48146352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT The effects of secondary rolling on the microstructure evolution and mechanical properties of Al/Mg/Al clad sheets have been investigated. The results indicate that a double-layer intermetallic compound (Mg2Al3 and Mg17Al12) forms and sandwiches the MgO film during the first rolling and annealing, while the sandwich structure shows a low peel strength owing to the intrinsic brittleness of intermetallic. However, a secondary rolling leads to a shear-induced breakage of the sandwich structure, whereupon the peel strength significantly increases from 1.3 N/mm to 12.7 N/mm on account of an effective bonding of the Mg/Al interface. The secondary rolling not only eliminates the influence of MgO on the interface, but also improves the bonding strength of the interface. Furthermore, the clad sheet can obtain an excellent elongation (21%) and remain of high interfacial strength (∼12 N/mm) after the recovery annealing.
{"title":"Effect of secondary rolling on the interfacial bonding strength and mechanical properties of Al/Mg/Al clad plates","authors":"Xiang-Zhi Cao, Chunhua Xu, Yu Li, Xuecheng Cao, Ruizhi Peng, J. Fang","doi":"10.1080/09500839.2022.2065702","DOIUrl":"https://doi.org/10.1080/09500839.2022.2065702","url":null,"abstract":"ABSTRACT The effects of secondary rolling on the microstructure evolution and mechanical properties of Al/Mg/Al clad sheets have been investigated. The results indicate that a double-layer intermetallic compound (Mg2Al3 and Mg17Al12) forms and sandwiches the MgO film during the first rolling and annealing, while the sandwich structure shows a low peel strength owing to the intrinsic brittleness of intermetallic. However, a secondary rolling leads to a shear-induced breakage of the sandwich structure, whereupon the peel strength significantly increases from 1.3 N/mm to 12.7 N/mm on account of an effective bonding of the Mg/Al interface. The secondary rolling not only eliminates the influence of MgO on the interface, but also improves the bonding strength of the interface. Furthermore, the clad sheet can obtain an excellent elongation (21%) and remain of high interfacial strength (∼12 N/mm) after the recovery annealing.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46512807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-22DOI: 10.1080/09500839.2022.2065701
Tiantian Huang, Fei Liu, Zhiyi Liu, Guangyu He, Yangcheng Hu
ABSTRACT A mechanism of dislocation multiplication is introduced. The surface of the Al20Cu2Mn3 phase in an Al alloy can act as a barrier to impede dislocation movement. When two dislocations with opposite Burgers vectors approach each other, dislocations can annihilate if the pair remains at a distance less than the critical distance for annihilation. A dislocation loop is then formed around the Al20Cu2Mn3 phase or dislocations interact with the loop forming a dislocation tangle, which can promote dislocation multiplication. The driving force for dislocation reproduction, the dislocation glide velocity and the rate of dislocation multiplication are discussed.
{"title":"Dislocation multiplication and dynamics in an aluminium alloy","authors":"Tiantian Huang, Fei Liu, Zhiyi Liu, Guangyu He, Yangcheng Hu","doi":"10.1080/09500839.2022.2065701","DOIUrl":"https://doi.org/10.1080/09500839.2022.2065701","url":null,"abstract":"ABSTRACT A mechanism of dislocation multiplication is introduced. The surface of the Al20Cu2Mn3 phase in an Al alloy can act as a barrier to impede dislocation movement. When two dislocations with opposite Burgers vectors approach each other, dislocations can annihilate if the pair remains at a distance less than the critical distance for annihilation. A dislocation loop is then formed around the Al20Cu2Mn3 phase or dislocations interact with the loop forming a dislocation tangle, which can promote dislocation multiplication. The driving force for dislocation reproduction, the dislocation glide velocity and the rate of dislocation multiplication are discussed.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59592410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-17DOI: 10.1080/09500839.2022.2049908
Zhenhuan Gao, Peng Zhang, Q. Niu, Jiao Li, L. Nie, X. Gong, Xiaolong Song
ABSTRACT After solutionizing and aging at 980°C for various durations, the compressive deformation behaviour and mechanisms of the directionally solidified nickel-based superalloy CM247LC are investigated at room temperature. Experimental results show that the yield strength decreases gradually from 991 ± 1.2–672 ± 7.5 MPa with increasing the γ′ precipitate size from 145 ± 2–604 ± 19 nm. Transmission electron microscope observations on the slightly deformed specimens reveal that, in contrast to previous researches, plastic deformation of all the specimens is controlled by strongly coupled dislocations cutting through γ′ precipitates. Based on these experimental results, the relationship between the yield strength and precipitate size is discussed.
{"title":"Deformation mechanisms in the directionally solidified nickel-based CM247LC at room temperature","authors":"Zhenhuan Gao, Peng Zhang, Q. Niu, Jiao Li, L. Nie, X. Gong, Xiaolong Song","doi":"10.1080/09500839.2022.2049908","DOIUrl":"https://doi.org/10.1080/09500839.2022.2049908","url":null,"abstract":"ABSTRACT After solutionizing and aging at 980°C for various durations, the compressive deformation behaviour and mechanisms of the directionally solidified nickel-based superalloy CM247LC are investigated at room temperature. Experimental results show that the yield strength decreases gradually from 991 ± 1.2–672 ± 7.5 MPa with increasing the γ′ precipitate size from 145 ± 2–604 ± 19 nm. Transmission electron microscope observations on the slightly deformed specimens reveal that, in contrast to previous researches, plastic deformation of all the specimens is controlled by strongly coupled dislocations cutting through γ′ precipitates. Based on these experimental results, the relationship between the yield strength and precipitate size is discussed.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45718978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-09DOI: 10.1080/09500839.2022.2048111
Ying Liu, Wen-Chih Lin, Bangfei Zhou, Xianghui Guo, Hao Cai, T. Zheng, B. Ding, Y. Zhong, Lei Zhang
ABSTRACT Al–Cu melts were used to study interdiffusion under a transverse magnetic field (TMF) using X-ray imaging. A novel gravity-assisted automatic docking device was used to create a long capillary of the diffusion couple. Compared with the results acquired using energy-dispersive spectroscopy, X-ray imaging is more convenient and accurate to determine concentration profiles along long capillaries using the numerous gray value intensities in the imaging. Because a TMF can inhibit melt convection, the interdiffusion coefficient (D AlCu) was reduced after applying a TMF of 2 T. Our results demonstrate that the application of X-ray imaging is an efficient way to study ex-situ diffusion in liquid melts.
{"title":"Ex-situ study of diffusion in liquid Al–Cu melts under a transverse magnetic field using X-ray imaging","authors":"Ying Liu, Wen-Chih Lin, Bangfei Zhou, Xianghui Guo, Hao Cai, T. Zheng, B. Ding, Y. Zhong, Lei Zhang","doi":"10.1080/09500839.2022.2048111","DOIUrl":"https://doi.org/10.1080/09500839.2022.2048111","url":null,"abstract":"ABSTRACT Al–Cu melts were used to study interdiffusion under a transverse magnetic field (TMF) using X-ray imaging. A novel gravity-assisted automatic docking device was used to create a long capillary of the diffusion couple. Compared with the results acquired using energy-dispersive spectroscopy, X-ray imaging is more convenient and accurate to determine concentration profiles along long capillaries using the numerous gray value intensities in the imaging. Because a TMF can inhibit melt convection, the interdiffusion coefficient (D AlCu) was reduced after applying a TMF of 2 T. Our results demonstrate that the application of X-ray imaging is an efficient way to study ex-situ diffusion in liquid melts.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47625888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT Ti–6Al–4V fine-grained plates were manufactured using a rolling method and then subjected to superplastic tensile tests at varying temperatures and strain rates on an AG 250KNE electronic tensile testing machine. The superplastic behaviours of the plates were also tested. A cavity-growth model was established and the changing laws of energy during cavity growth and microstructure evolution of superplastic deformation were predicted. The Ti–6Al–4V alloy possessed the maximum elongation rate of 886% at 840°C and a strain rate of 5 × 10−4 s−1. The strain-rate sensitivity index m for this alloy was 0.54. The mechanism of superplastic deformation was established to be strain-induced grain-boundary slip, and the mechanism of cavity growth to be plasticity-controlled cavity coalescence and growth.
{"title":"Modelling of cavity growth during the superplastic flow of a fine-grained Ti–6Al–4V titanium alloy processed by direct rolling","authors":"Xin Wang, Ge Zhou, Chao Liu, Siqian Zhang, Haoyu Zhang, Feng Li, Lijia Chen","doi":"10.1080/09500839.2022.2036380","DOIUrl":"https://doi.org/10.1080/09500839.2022.2036380","url":null,"abstract":"ABSTRACT Ti–6Al–4V fine-grained plates were manufactured using a rolling method and then subjected to superplastic tensile tests at varying temperatures and strain rates on an AG 250KNE electronic tensile testing machine. The superplastic behaviours of the plates were also tested. A cavity-growth model was established and the changing laws of energy during cavity growth and microstructure evolution of superplastic deformation were predicted. The Ti–6Al–4V alloy possessed the maximum elongation rate of 886% at 840°C and a strain rate of 5 × 10−4 s−1. The strain-rate sensitivity index m for this alloy was 0.54. The mechanism of superplastic deformation was established to be strain-induced grain-boundary slip, and the mechanism of cavity growth to be plasticity-controlled cavity coalescence and growth.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45635348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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