Pub Date : 2023-09-15DOI: 10.1007/s11661-023-07190-x
Q. Champdoizeau, J. Valloton, H. Henein
{"title":"Thermophysical Properties Measurement of Al–22.5 wt pctCu in Reduced Gravity Using the ISS-EML","authors":"Q. Champdoizeau, J. Valloton, H. Henein","doi":"10.1007/s11661-023-07190-x","DOIUrl":"https://doi.org/10.1007/s11661-023-07190-x","url":null,"abstract":"","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135395132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-09-13DOI: 10.1007/s11661-023-07194-7
N. D’Souza, I. M. Edmonds, M. Perry, D. M. Collins
Abstract A crystallography-based method is presented for the critical appraisal of possible mechanisms that trigger the formation of secondary grains during directional solidification. The method permits an analysis of a large population of defects, while avoiding the pitfalls of the metallographic sectioning approach that is affected by dendrite stereology. Here, the nickel-base superalloy CMSX-4, an alloy commonly used for single crystal turbine blade applications, is studied. All secondary grains originate exclusively at the external surface and when the off-axial primary $$langle 0,0,1rangle$$ ⟨001⟩ crystal orientations are measured, are evident at both the converging and diverging dispositions of the single crystal primary dendrites without a noticeable bias. Almost all of the secondary grains have low misorientations, with an average misorientation between 5 to 15 deg. No systematic deviation between the individual $$langle 0,0,1rangle$$ ⟨001⟩ orientations of the secondary grain and the single crystal is observed. A significant twist contribution about an axis within ~ 30 deg from one of the secondary arms occurs when primary arms converge on the external surface, but both twist and tilt prevail for the diverging case. Both nucleation and buoyancy driven thermo-solutal convection can be eliminated as potential mechanisms. Thermo-mechanical deformation is deduced to be the most likely mechanism; deformation must originate in the vicinity of the primary dendrite tips. It is proposed that dendrite deflection arises primarily from the resistance encountered by the primary tips with the external surface during axial contraction in the presence of a dominant vertical thermal gradient.
{"title":"A Crystallographic Basis for Critically Evaluating the Mechanisms for Secondary Grain Formation During Directional Solidification","authors":"N. D’Souza, I. M. Edmonds, M. Perry, D. M. Collins","doi":"10.1007/s11661-023-07194-7","DOIUrl":"https://doi.org/10.1007/s11661-023-07194-7","url":null,"abstract":"Abstract A crystallography-based method is presented for the critical appraisal of possible mechanisms that trigger the formation of secondary grains during directional solidification. The method permits an analysis of a large population of defects, while avoiding the pitfalls of the metallographic sectioning approach that is affected by dendrite stereology. Here, the nickel-base superalloy CMSX-4, an alloy commonly used for single crystal turbine blade applications, is studied. All secondary grains originate exclusively at the external surface and when the off-axial primary $$langle 0,0,1rangle$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mo>⟨</mml:mo> <mml:mn>0</mml:mn> <mml:mspace /> <mml:mn>0</mml:mn> <mml:mspace /> <mml:mn>1</mml:mn> <mml:mo>⟩</mml:mo> </mml:mrow> </mml:math> crystal orientations are measured, are evident at both the converging and diverging dispositions of the single crystal primary dendrites without a noticeable bias. Almost all of the secondary grains have low misorientations, with an average misorientation between 5 to 15 deg. No systematic deviation between the individual $$langle 0,0,1rangle$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mo>⟨</mml:mo> <mml:mn>0</mml:mn> <mml:mspace /> <mml:mn>0</mml:mn> <mml:mspace /> <mml:mn>1</mml:mn> <mml:mo>⟩</mml:mo> </mml:mrow> </mml:math> orientations of the secondary grain and the single crystal is observed. A significant twist contribution about an axis within ~ 30 deg from one of the secondary arms occurs when primary arms converge on the external surface, but both twist and tilt prevail for the diverging case. Both nucleation and buoyancy driven thermo-solutal convection can be eliminated as potential mechanisms. Thermo-mechanical deformation is deduced to be the most likely mechanism; deformation must originate in the vicinity of the primary dendrite tips. It is proposed that dendrite deflection arises primarily from the resistance encountered by the primary tips with the external surface during axial contraction in the presence of a dominant vertical thermal gradient.","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135734712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-09-13DOI: 10.1007/s11661-023-07198-3
Tao Chen, Sijia Hu, Shiqi Li, Liuwei Zheng, Lifei Wang, Yingzhi Wang, Qinghuan Huo
{"title":"Improving the Mechanical Properties of an Age-Hardenable Magnesium Alloy via Regulating Precipitate Scale and Building Dislocation Configuration","authors":"Tao Chen, Sijia Hu, Shiqi Li, Liuwei Zheng, Lifei Wang, Yingzhi Wang, Qinghuan Huo","doi":"10.1007/s11661-023-07198-3","DOIUrl":"https://doi.org/10.1007/s11661-023-07198-3","url":null,"abstract":"","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135780776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-09-11DOI: 10.1007/s11661-023-07193-8
C. J. Farnin, E. N. Coker, P. A. Salinas, J. N. DuPont
{"title":"The Effects of Silicon and Niobium Concentration on the Solidification Behavior and Microstructure of Cast Monel Alloys","authors":"C. J. Farnin, E. N. Coker, P. A. Salinas, J. N. DuPont","doi":"10.1007/s11661-023-07193-8","DOIUrl":"https://doi.org/10.1007/s11661-023-07193-8","url":null,"abstract":"","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135939034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-09-11DOI: 10.1007/s11661-023-07161-2
G. N. Muradyan, S. K. Dolukhanyan, O. P. Ter-Galstyan, N. L. Mnatsakanyan, K. V. Asatryan, S. S. Mardanyan, S. E. Mnatsakanyan, A. A. Hovhannisyan
{"title":"Synthesis in Hydride Cycle of Near-α Ti–8Al–1Mo–1V Alloy","authors":"G. N. Muradyan, S. K. Dolukhanyan, O. P. Ter-Galstyan, N. L. Mnatsakanyan, K. V. Asatryan, S. S. Mardanyan, S. E. Mnatsakanyan, A. A. Hovhannisyan","doi":"10.1007/s11661-023-07161-2","DOIUrl":"https://doi.org/10.1007/s11661-023-07161-2","url":null,"abstract":"","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135980509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-09-11DOI: 10.1007/s11661-023-07195-6
W. H. Sillekens, M. P. Sansoucie, R. W. Hyers, G. P. Bracker, D. M. Matson
{"title":"Foreword: Materials Research in Reduced Gravity 2023","authors":"W. H. Sillekens, M. P. Sansoucie, R. W. Hyers, G. P. Bracker, D. M. Matson","doi":"10.1007/s11661-023-07195-6","DOIUrl":"https://doi.org/10.1007/s11661-023-07195-6","url":null,"abstract":"","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135939284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-09-11DOI: 10.1007/s11661-023-07192-9
Chenhao Huang, Shunlin Zhang, Dong Pan, Xing Yin, Yong Chen, Haibo Zhao, Jun Wang
{"title":"Three Composite Coatings Al + Al2O3, Fe–Al and Fe–Al + Al2O3 as a Barrier Against LBE Alloys on F/M Steel by Multi-arc Ion Plating","authors":"Chenhao Huang, Shunlin Zhang, Dong Pan, Xing Yin, Yong Chen, Haibo Zhao, Jun Wang","doi":"10.1007/s11661-023-07192-9","DOIUrl":"https://doi.org/10.1007/s11661-023-07192-9","url":null,"abstract":"","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135982384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Temperature-Dependent Easy Slip System Transformation in WC and TiC","authors":"Xiao Lin, Xing Feng, Mengyao He, Hailiang Liu, Sha Liu, Bin Wen","doi":"10.1007/s11661-023-07187-6","DOIUrl":"https://doi.org/10.1007/s11661-023-07187-6","url":null,"abstract":"","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-09-10DOI: 10.1007/s11661-023-07186-7
Sudipta Pramanik, Jan Krüger, Mirko Schaper, Kay-Peter Hoyer
Abstract FeCo alloys are important materials used in pumps and motors in the offshore oil and gas drilling industry. These alloys are subjected to marine environments with a high NaCl concentration, therefore, corrosion and catastrophic failure are anticipated. So, the surface dissolution of additively manufactured FeCo samples is investigated in a quasi- in situ manner, in particular, the pitting corrosion in 5.0 wt pct NaCl solution. The local dissolution of the same sample region is monitored after 24, 72, and 168 hours. Here, the formation of rectangular and circular pits of ultra-fine dimensions (less than 0.5 µ m) is observed with increasing immersion time. In addition, the formation of a corrosion-inhibiting surface layer is detected on the sample surface. Surface dissolution leads to a change in the surface structure, however, no change in grain shape or grain size is noticed. The surface topography after local dissolution is correlated to the grain orientation. Quasi- in situ analysis shows the preferential dissolution of high-angle grain boundaries (HAGBs) leading to a change in the fraction of HAGBs and low-angle grain boundaries fraction (LAGBs). For the FeCo sample, a potentiodynamic polarisation test reveals a corrosion potential (E corr ) of − 0.475 V referred to the standard hydrogen electrode (SHE) and a corrosion exchange current density (i corr ) of 0.0848 A/m 2 . Furthermore, quasi- in situ experiments showed that grains oriented along certain crystallographic directions are corroding more compared to other grains leading to a significant decrease in the local surface height. Grains with a plane normal close to the $$langle {1}00rangle$$ ⟨100⟩ direction reveal lower surface dissolution and higher corrosion resistance, whereas planes normal close to the $$langle {11}0rangle$$ ⟨110⟩ direction and the $$langle {111}rangle$$ ⟨111⟩ direction exhibit a higher surface dissolution.
{"title":"Quasi-In Situ Localized Corrosion of an Additively Manufactured FeCo Alloy in 5 Wt Pct NaCl Solution","authors":"Sudipta Pramanik, Jan Krüger, Mirko Schaper, Kay-Peter Hoyer","doi":"10.1007/s11661-023-07186-7","DOIUrl":"https://doi.org/10.1007/s11661-023-07186-7","url":null,"abstract":"Abstract FeCo alloys are important materials used in pumps and motors in the offshore oil and gas drilling industry. These alloys are subjected to marine environments with a high NaCl concentration, therefore, corrosion and catastrophic failure are anticipated. So, the surface dissolution of additively manufactured FeCo samples is investigated in a quasi- in situ manner, in particular, the pitting corrosion in 5.0 wt pct NaCl solution. The local dissolution of the same sample region is monitored after 24, 72, and 168 hours. Here, the formation of rectangular and circular pits of ultra-fine dimensions (less than 0.5 µ m) is observed with increasing immersion time. In addition, the formation of a corrosion-inhibiting surface layer is detected on the sample surface. Surface dissolution leads to a change in the surface structure, however, no change in grain shape or grain size is noticed. The surface topography after local dissolution is correlated to the grain orientation. Quasi- in situ analysis shows the preferential dissolution of high-angle grain boundaries (HAGBs) leading to a change in the fraction of HAGBs and low-angle grain boundaries fraction (LAGBs). For the FeCo sample, a potentiodynamic polarisation test reveals a corrosion potential (E corr ) of − 0.475 V referred to the standard hydrogen electrode (SHE) and a corrosion exchange current density (i corr ) of 0.0848 A/m 2 . Furthermore, quasi- in situ experiments showed that grains oriented along certain crystallographic directions are corroding more compared to other grains leading to a significant decrease in the local surface height. Grains with a plane normal close to the $$langle {1}00rangle$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mo>⟨</mml:mo> <mml:mn>100</mml:mn> <mml:mo>⟩</mml:mo> </mml:mrow> </mml:math> direction reveal lower surface dissolution and higher corrosion resistance, whereas planes normal close to the $$langle {11}0rangle$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mo>⟨</mml:mo> <mml:mn>110</mml:mn> <mml:mo>⟩</mml:mo> </mml:mrow> </mml:math> direction and the $$langle {111}rangle$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mo>⟨</mml:mo> <mml:mn>111</mml:mn> <mml:mo>⟩</mml:mo> </mml:mrow> </mml:math> direction exhibit a higher surface dissolution.","PeriodicalId":49827,"journal":{"name":"Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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