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首页> 外文期刊>Materials Science and Engineering >Effect of austenite deformation in non-recrystallization region on microstructure development in low-silicon content TRIP-assisted steels
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Effect of austenite deformation in non-recrystallization region on microstructure development in low-silicon content TRIP-assisted steels

机译：低硅含量TRIP辅助钢中非再结晶区奥氏体变形对组织发展的影响

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摘要

The influence of austenite deformation in non-recrystallization region on microstructural development in low-silicon content TRIP-assisted steels was investigated. Laboratory simulation of a typical thermo-mechanical control processing was carried out in an automated hot-compression testing machine. Specimens subjected to a typical multi-stage isothermal deformation/cooling program were deformed to true strains of 0, -0.15, -0.25 and -0.35 at various temperatures in austenite non-recrystallization region. Moessbauer spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and a novel tint-etching method were used to investigate the microstructure of deformed specimens. The results indicated that the maximum volume fraction (V_(RA)) and carbon content (C_(RA)%) of retained austenite can be obtained by deforming samples to some intermediate strains (ε=-0.15 for V_(RA) and ε= -0.25 for C_(RA)%). However, further straining of samples to ε= -0.35 resulted in a drastic reduction of both parameters due to formation of pearlite. It was found that a decrease in deformation temperature resulted in increasing V_(RA) and C_(RA)%. Moreover, deformation of austenite was associated with morphology changes in retained austenite particles from interlath film-like type in undeformed specimens to blocky and encapsulated types in the deformed specimens.
机译：研究了低硅含量TRIP辅助钢中非再结晶区奥氏体变形对组织发展的影响。在自动热压测试机中对典型的热机械控制过程进行了实验室模拟。在奥氏体非重结晶区域中，在不同温度下，经受了典型的多阶段等温变形/冷却程序的试样都变形为真实应变，分别为0，-0.15，-0.25和-0.35。用Moessbauer光谱，X射线衍射（XRD），扫描电子显微镜（SEM）和新颖的色调蚀刻方法研究了变形试样的微观结构。结果表明，可以通过将样品变形为一些中间应变（V_（RA）为ε= -0.15，ε==）来获得残余奥氏体的最大体积分数（V_（RA））和碳含量（C_（RA）％）。 C_（RA）％为-0.25）。然而，由于珠光体的形成，样品进一步应变至ε= -0.35导致两个参数急剧降低。发现变形温度的降低导致V_（RA）和C_（RA）％的增加。此外，奥氏体的变形与残余奥氏体颗粒的形态变化有关，从未变形试样的中间层状薄膜状到变形试样的块状和包囊型。

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