On the Plasticity of Bimodal Structures in Titanium Alloys
The onset of plasticity in engineering titanium alloys with bimodal microstructures depends on the activation of slip in the equiaxed α grains. We use protocols based on slip trace offset analysis to measure the ratios of critical resolved shear strengths (CRSS) in the equiaxed α grains in bimodal m...
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| Published in | MATERIALS TRANSACTIONS Vol. 66; no. 5; pp. 479 - 489 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Sendai
The Japan Institute of Metals and Materials
01.05.2025
公益社団法人 日本金属学会 Japan Science and Technology Agency |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1345-9678 1347-5320 |
| DOI | 10.2320/matertrans.MT-MC2024019 |
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| Abstract | The onset of plasticity in engineering titanium alloys with bimodal microstructures depends on the activation of slip in the equiaxed α grains. We use protocols based on slip trace offset analysis to measure the ratios of critical resolved shear strengths (CRSS) in the equiaxed α grains in bimodal microstructures of Ti 6242 and Ti 6246 alloys. The resulting CRSS ratios for prismatic 〈a〉/basal 〈a〉 and pyramidal 〈a〉/basal 〈a〉 for Ti 6242 vary depending on whether the probability of slip is estimated at high Schmid factors for these slip systems or average Schmid factors over the range of orientations of equiaxed α used in the dataset. We compare these ratios to the existing data on these and other titanium alloys. We then examine slip in transformed β in these bimodal structures and conclude that deformation in transformed β is influenced strongly by slip transfer from equiaxed α arising from orientation relationships between equiaxed α and β rather than global Schmid factors associated with the load axis. |
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| AbstractList | The onset of plasticity in engineering titanium alloys with bimodal microstructures depends on the activation of slip in the equiaxed equiaxed α grains. We use protocols based on slip trace offset analysis to measure the ratios of critical resolved shear strengths (CRSS) in the equiaxed α grains in bimodal microstructures of Ti 6242 and Ti 6246 alloys. The resulting CRSS ratios for prismatic /basal and pyramidal /basal for Ti 6242 vary depending on whether the probability of slip is estimated at high Schmid factors for these slip systems or average Schmid factors over the range of orientations of equiaxed α used in the dataset. We compare these ratios to the existing data on these and other titanium alloys. We then examine slip in transformed β in these bimodal structures and conclude that deformation in transformed β is influenced strongly by slip transfer from equiaxed α arising from orientation relationships between equiaxed α and β rather than global Schmid factors associated with the load axis. The onset of plasticity in engineering titanium alloys with bimodal microstructures depends on the activation of slip in the equiaxed α grains. We use protocols based on slip trace offset analysis to measure the ratios of critical resolved shear strengths (CRSS) in the equiaxed α grains in bimodal microstructures of Ti 6242 and Ti 6246 alloys. The resulting CRSS ratios for prismatic 〈a〉/basal 〈a〉 and pyramidal 〈a〉/basal 〈a〉 for Ti 6242 vary depending on whether the probability of slip is estimated at high Schmid factors for these slip systems or average Schmid factors over the range of orientations of equiaxed α used in the dataset. We compare these ratios to the existing data on these and other titanium alloys. We then examine slip in transformed β in these bimodal structures and conclude that deformation in transformed β is influenced strongly by slip transfer from equiaxed α arising from orientation relationships between equiaxed α and β rather than global Schmid factors associated with the load axis. |
| ArticleNumber | MT-MC2024019 |
| Author | Zhao, Zhuowen Eisenlohr, Philip Balachandran, Shanoob Banerjee, Dipankar Banerjee, Arunima |
| Author_xml | – sequence: 1 fullname: Eisenlohr, Philip organization: Chemical Engineering and Materials Science, Michigan State University – sequence: 1 fullname: Banerjee, Arunima organization: Material Systems and Inspection, GE Aerospace – sequence: 1 fullname: Balachandran, Shanoob organization: Alloyed Ltd – sequence: 1 fullname: Zhao, Zhuowen organization: Chemical Engineering and Materials Science, Michigan State University – sequence: 1 fullname: Banerjee, Dipankar organization: Materials Engineering, Indian Institute of Science |
| BackLink | https://cir.nii.ac.jp/crid/1390866415331701504$$DView record in CiNii |
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| SubjectTerms | Bimodal Structures Equiaxed structure Grains Microstructure Orientation relationships Plastic properties Plasticity Shear strength Slip Titanium Alloys Titanium base alloys |
| Title | On the Plasticity of Bimodal Structures in Titanium Alloys |
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