Decoupling the Impacts of Strain Rate and Temperature on TRIP in a Q&P Steel
Decoupling the Impacts of Strain Rate and Temperature on TRIP in a Q&P Steel
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DOI：
10.1007/s11837-021-05039-5
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发表时间：
2022-01
期刊：
影响因子：
2.6
通讯作者：
C. Finfrock;D. Bhattacharya;B. McBride;T. Ballard;A. Clarke;K. Clarke
中科院分区：
文献类型：
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作者：
C. Finfrock;D. Bhattacharya;B. McBride;T. Ballard;A. Clarke;K. Clarke
本文研究了应变速率和温度对一种调质钢应变硬化速率的个别影响。在准静态试验中，电阻加热被用来模拟高应变率变形过程中发生的变形诱导加热，而变形诱导马氏体相变的跟踪相结合的X射线和电子背散射衍射。独特的加工硬化率在各种热机械条件下进行了讨论，基于并发位错滑移和相变诱导塑性变形机制之间的平衡。衍射和应变硬化数据表明，施加的应变速率和温度表现出不协调的影响马氏体相变。应变速率的增加有利于马氏体相变的发生，而温度的升高则抑制了马氏体相变的发生。
The individual effects of strain rate and temperature on the strain hardening rate of a quenched and partitioned steel have been examined. During quasistatic tests, resistive heating was used to simulate the deformation-induced heating that occurs during high-strain-rate deformation, while the deformation-induced martensitic transformation was tracked by a combination of x-ray and electron backscatter diffraction. Unique work hardening rates under various thermal–mechanical conditions are discussed, based on the balance between the concurrent dislocation slip and transformation-induced plasticity deformation mechanisms. The diffraction and strain hardening data suggest that the imposed strain rate and temperature exhibited dissonant influences on the martensitic phase transformation. Increasing the strain rate appeared to enhance the martensitic transformation, while increasing the temperature suppressed the martensitic transformation.