التفاصيل البيبلوغرافية
| العنوان: |
Unveiling the relationship between dislocation structure evolution and strain hardening behavior of S32654 super-austenitic stainless steel. |
| المؤلفون: |
Liao, Luhai, Zhang, He, Hu, Shengbo, Guo, Rui, Yuan, Xuwen, Li, Fengguang |
| المصدر: |
Journal of Materials Science; Jul2024, Vol. 59 Issue 27, p12715-12731, 17p |
| مصطلحات موضوعية: |
STRAIN hardening, DISLOCATION structure, TENSILE strength, TRANSMISSION electron microscopy, STRAIN rate, STAINLESS steel |
| مستخلص: |
Understanding the relationship between dislocation structure evolution and strain hardening behavior is crucial for the development of high-strength and high-ductility alloys. In this work, the strain hardening mechanism of S32654 super-austenitic stainless steel is studied by electron backscatter diffraction and transmission electron microscopy. S32654 is characterized by a constant high strain hardening rate accompanied by 835 ± 10 MPa ultimate tensile strength and 67 ± 3% elongation. Deformation microstructures at different strain levels are investigated in order to unveil the influence of microstructure on mechanical properties. Research results indicate that although the strain hardening curve of S32654 shows similarities to high-strength twinning-induced plasticity (TWIP) steels, deformation-induced twinning is not the primary strain hardening mechanism for S32654. With increasing deformation, the evolution of dislocation structures in S32654 is mainly dominated by the continuous refinement of slip bands. The spacing between slip bands, as a microstructural parameter, can describe the flow stress curve. The TWIP effect only contributes to the strain hardening of S32654 in the later stages of deformation. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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