Abstract
In this study, a series of cyclic tests on a 304L stainless steel with different loading paths were conducted. It revealed that as the non-proportionality of loading path increased, the growth rate of martensitic content became higher and its distribution among the austenitic matrix appeared more uniform. A phase transformation kinetics equation was modified to describe the effect of cumulative plastic strain, loading amplitude and loading path on martensitic transformation. A stress decomposition rule was proposed to incorporate both the non-proportional hardening and martensitic transformation hardening to describe the hardening mechanism.
Original language | English |
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Pages (from-to) | 338-347 |
Number of pages | 10 |
Journal | International Journal of Fatigue |
Volume | 124 |
DOIs | |
State | Published - Jul 2019 |
Externally published | Yes |
Funding
The authors gratefully acknowledge financial support for this work from the National Key Research and Development Program of China (No. 2017YFC0805600 ) and the National Natural Science Foundation of China (No. 51435012 ).
Keywords
- Martensitic transformation
- Metastable austenitic stainless steels
- Non-proportional cyclic loading
- Non-proportionality of loading path