Biaxial path dependence of macroscopic response and microscopic dislocation substructure in type 302 stainless steel
- Xian Jiaotong Univ. (China). Research Inst. of Engineering Mechanics
During axial-torsional loading in type 302 stainless steel an obvious stress delay appears in comparison with the strain increment vector after the turning point of a strain path for all specimens. Macroscopic response shows that the equivalent stress suddenly drops then increases, firstly softening and subsequently hardening degrees are related to the turning angle values. The deformed dislocation configurations were defined by means of transmission electron microscopy. A tendency to form dislocation cells with the increase of nonproportionality and accumulated plastic strain is repeated. These macroscopic phenomena are explained based on the observation of microscopic dislocation structure and the analysis of maximum shear plane change during nonproportional loading. Finally, the evolution regularity of dislocation configuration with nonproportionality and accumulated plastic strain is discussed.
- OSTI ID:
- 367315
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 8 Vol. 44; ISSN XZ504Y; ISSN 1359-6454
- Country of Publication:
- United States
- Language:
- English
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