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利用电子背散射衍射技术(EBSD)技术分析了两种不同热处理工艺下的TRIP800钢板取向分布、晶粒角度、显微织构与残余奥氏体的分布及其稳定性,并结合试验钢的力学性能进行了讨论。研究表明:两类试验退火钢的晶粒没有优势的取向分布,呈现较弱的织构;面心立方晶粒中的取向以{001}<100>与{011}<100>较多;残余奥氏体大多以分布在晶界上为主,但拉伸断裂后基本上消失,即产生了相变诱导塑性(TRIP)效应,而体心立方晶粒内部的残余奥氏体相对稳定,断裂后还有部分稳定的存在。
Electron backscatter diffraction (EBSD) technique was used to analyze the orientation distribution, grain angle, microstructure and residual austenite distribution and stability of TRIP800 under two different heat treatments. Combining the mechanical properties of the test steel Performance is discussed. The results show that the grains of the two types of experimental annealed steels have no dominant orientation distribution and show weaker texture. The orientations of {001} <100> and {011} <100> are more in the face-centered cubic grains. Most of the austenite is mainly distributed on the grain boundary, but disappears after tensile fracture, ie, the phase transition induced plasticity (TRIP) effect occurs. However, the retained austenite in the body-centered cubic grains is relatively stable and fractured After there is still some stability.