CAJ | 학술논문

相变塑性是淬火过程中伴随着马氏体相变所发生的一种特殊变形现象.从Greenwood-Johnson公式出发，通过实验测试出该公式中的常数K，发现K不仅与应力有关，而且和马氏体转变量的大小也有一定关系.同时，提出了一种新的计算相变塑性的方法.将该公式应用到淬火的数值模拟中，对比计算结果和实验测试结果表明，淬火模拟的数学模型中考虑相变塑性比不考虑相变塑性更符合实际情况.
상변소성시쉬화과정중반수착마씨체상변소발생적일충특수변형현상.종Greenwood-Johnson공식출발，통과실험측시출해공식중적상수K，발현K불부여응력유관，이차화마씨체전변량적대소야유일정관계.동시，제출료일충신적계산상변소성적방법.장해공식응용도쉬화적수치모의중，대비계산결과화실험측시결과표명，쉬화모의적수학모형중고필상변소성비불고필상변소성경부합실제정황.
Phase transformation plasticity is a special distortion phenomenon with phase transformation in quenching process. The parameter K in the Greenwood-Johnson equation was determined by experiments. It is found that K is not only related to the stress, but also to the quantity of martensitic phase transformation. At the same time, a new method to calculate the phase transformation was presented. The Greenwood-Johnson equation was applied in the numerical simulation of quenching process. Comparison between the calculating and testing results shows that the mathematical model of quenching with phase transformation plasticity is more coincident with the fact than the model without phase transformation plasticity.