An Atomic Study of Substructures Formed by Shear Transformation in Cast γ-TiAl
Substructures and microsegregation of γ/γ laths are analyzed with HRTEM and HAADF-STEM. Results show that the substructures are generated during evolution of shear transformation on the (111-) plane of γ lath. At the beginning, shear transformation evolves in a single γ lath, and a superstructure in...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/675963 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832550260525760512 |
|---|---|
| author | Hanlei Zhang Hongchao Kou Xiaolei Li Bin Tang Jinshan Li |
| author_facet | Hanlei Zhang Hongchao Kou Xiaolei Li Bin Tang Jinshan Li |
| author_sort | Hanlei Zhang |
| collection | DOAJ |
| description | Substructures and microsegregation of γ/γ laths are analyzed with HRTEM and HAADF-STEM. Results show that the substructures are generated during evolution of shear transformation on the (111-) plane of γ lath. At the beginning, shear transformation evolves in a single γ lath, and a superstructure intrinsic stacking fault (SISF) forms in the γ lath. After the formation of the SISF, the shear transformation may evolve in two different ways. If the shear transformation evolves into neighboring γ laths, the SISF also penetrates into neighboring γ laths and a ribbon of SISFs forms. If shear transformation continues to evolve in the original lath, complex substructures begin to form in the original. If shear transformation in the original lath is homogeneous and complete, secondary twin forms which may further grow into twin intersection. Incomplete shear transformation could not form secondary twins but generates a high concentration of planar faults on the (111-) plane. These planar faults may further penetrate the γ/γ lath interface, grow into adjacent laths, and form a ribbon of planar faults. |
| format | Article |
| id | doaj-art-1d7c4aae4d9641a799bcc639ec68f881 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-1d7c4aae4d9641a799bcc639ec68f8812025-02-03T06:07:07ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/675963675963An Atomic Study of Substructures Formed by Shear Transformation in Cast γ-TiAlHanlei Zhang0Hongchao Kou1Xiaolei Li2Bin Tang3Jinshan Li4State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaSubstructures and microsegregation of γ/γ laths are analyzed with HRTEM and HAADF-STEM. Results show that the substructures are generated during evolution of shear transformation on the (111-) plane of γ lath. At the beginning, shear transformation evolves in a single γ lath, and a superstructure intrinsic stacking fault (SISF) forms in the γ lath. After the formation of the SISF, the shear transformation may evolve in two different ways. If the shear transformation evolves into neighboring γ laths, the SISF also penetrates into neighboring γ laths and a ribbon of SISFs forms. If shear transformation continues to evolve in the original lath, complex substructures begin to form in the original. If shear transformation in the original lath is homogeneous and complete, secondary twin forms which may further grow into twin intersection. Incomplete shear transformation could not form secondary twins but generates a high concentration of planar faults on the (111-) plane. These planar faults may further penetrate the γ/γ lath interface, grow into adjacent laths, and form a ribbon of planar faults.http://dx.doi.org/10.1155/2015/675963 |
| spellingShingle | Hanlei Zhang Hongchao Kou Xiaolei Li Bin Tang Jinshan Li An Atomic Study of Substructures Formed by Shear Transformation in Cast γ-TiAl Advances in Materials Science and Engineering |
| title | An Atomic Study of Substructures Formed by Shear Transformation in Cast γ-TiAl |
| title_full | An Atomic Study of Substructures Formed by Shear Transformation in Cast γ-TiAl |
| title_fullStr | An Atomic Study of Substructures Formed by Shear Transformation in Cast γ-TiAl |
| title_full_unstemmed | An Atomic Study of Substructures Formed by Shear Transformation in Cast γ-TiAl |
| title_short | An Atomic Study of Substructures Formed by Shear Transformation in Cast γ-TiAl |
| title_sort | atomic study of substructures formed by shear transformation in cast γ tial |
| url | http://dx.doi.org/10.1155/2015/675963 |
| work_keys_str_mv | AT hanleizhang anatomicstudyofsubstructuresformedbysheartransformationincastgtial AT hongchaokou anatomicstudyofsubstructuresformedbysheartransformationincastgtial AT xiaoleili anatomicstudyofsubstructuresformedbysheartransformationincastgtial AT bintang anatomicstudyofsubstructuresformedbysheartransformationincastgtial AT jinshanli anatomicstudyofsubstructuresformedbysheartransformationincastgtial AT hanleizhang atomicstudyofsubstructuresformedbysheartransformationincastgtial AT hongchaokou atomicstudyofsubstructuresformedbysheartransformationincastgtial AT xiaoleili atomicstudyofsubstructuresformedbysheartransformationincastgtial AT bintang atomicstudyofsubstructuresformedbysheartransformationincastgtial AT jinshanli atomicstudyofsubstructuresformedbysheartransformationincastgtial |