期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 236, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2021.111322
关键词
Crystal plasticity; Transformation induced plasticity; Microstructure; Adiabatic heating
类别
资金
- Business Finland [7980/31/2018]
The study presents a crystal plasticity model to analyze the microscale deformation of 301LN stainless steel, considering phase transformation and dislocation slip mechanisms. The model reveals the material's strain hardening and phase transformation characteristics under different strain rates and temperatures, showing good agreement with experimental findings.
Strain induced phase transformation in metastable 301LN stainless steel generates a heterogeneous multiphase microstructure with a capability to achieve excellent strain hardening. The microstructural deformation mechanisms, prior deformation history and their dependency on strain rate and temperature determine much of the desired dynamically evolving strength of the material. To analyze microscale deformation of the material and obtain suitable computational tools to aid material development, this work formulates a crystal plasticity model involving a phase transformation mechanism together with dislocation slip in parent austenite and child martensite. The model is used to investigate microstructural deformation with computational polycrystalline aggregates. In this context, material's strain hardening and phase transformation characteristics are analyzed in a range of quasi-static and dynamic strain rates. Adiabatic heating effects are accounted for in the model framework to elucidate the role of grain level heating under the assumption of fully adiabatic conditions. The model's temperature dependency is analyzed. The modeling results show good agreement with experimental findings.
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