Microstructural evolution of metastable austenitic steel during high-pressure torsion and subsequent heat treatment
Microstructural evolution of metastable austenitic steel during high-pressure torsion and subsequent heat treatment
复制标题
亚稳态奥氏体钢在高压扭转和后续热处理过程中的微观结构演变
DOI：
10.1088/1757-899x/63/1/012053
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Y.Z. Tian and N. Tsuji
中科院分区：
文献类型：
--
作者：
S. Chen;A. Shibata;L.J. Zhao;S. Gao;Y.Z. Tian and N. Tsuji
对Fe-24Ni-0.3C(wt.%)合金中的亚稳奥氏体经高压扭转处理后进行热处理。经HPT处理的材料具有由高度变形的奥氏体和形变诱发马氏体组成的片层组织。形变诱发马氏体逆转变和残余奥氏体回复/再结晶在500℃以上完成，得到完全退火的不同晶粒度的单相奥氏体相。由于相变诱发塑性，超细晶纳米晶奥氏体具有较高的屈服强度和较大的塑性。
Metastable austenite in a Fe-24Ni-0.3 C (wt.%) alloy was processed by high-pressure torsion and subsequently heat-treated. The HPT-processed material had lamellae structures composed of highly deformed austenite and deformation-induced martensite. The reverse transformation of the deformation-induced martensite and recovery/recrystallization of the retained austenite completed above 500 C and resulted in fully annealed and single-phase austenite with different grain sizes. The ultrafine-grained and nanocrystalline austenite showed high yield strength and large ductility due to transformation-induced plasticity.