摘要利用3D EBSD-FIB(three dimensional electron backscatter diffraction-focused ion beam)技术,以高锰钢为实验材料,构建晶粒三维立体形貌,并对马氏体惯习面进行观察分析。结果表明:热致板条状马氏体表面平直,接近马氏体的{110}α,惯习面平行于奥氏体的{225}γ,其初始形核及后期生长均在{225}γ上进行;而形变诱发形成的板条状马氏体表面和惯习面分布近于{021}α和{225}γ,初始形核和前期生长沿{225}γ,后期生长沿{111}γ,由于外加应力,其表面发生弯曲变形,形核时间不同,偏离{225}γ-{111}γ程度不同。
Abstract：The 3D morphology of lath martensite was reconstructed, and its habit plane was analyzed in high manganese steels,using a system of 3D EBSD-FIB (three dimensional electron backscatter diffraction- focused ion beam). The results show that the surfaces of thermally-induced lath martensite are straight and close to martensitic {110}α, and the habit planes are close to austenitic {225}γ; the directions of initial nucleation and the later growth are along {225}γ plane. The surfaces and the habit planes of deformation-induced lath martensite are on the verge of {021}α and {225}γ, respectively; the nucleation and early growth are along {225}γ, while later growth planes are changed to {111}γ; because of the external stress, its surfaces are flexuous, and the degree of the deviations of the ones with {225}γ-{111}γ is various with nucleation time.
王会珍, 杨平, 毛卫民. 板条状马氏体形貌和惯习面的 3D EBSD分析[J]. 材料工程, 2013, 0(4): 74-80.
WANG Hui-zhen, YANG Ping, MAO Wei-min. 3D EBSD Analysis of Morphology and Habit Plane for Lath Martensite. Journal of Materials Engineering, 2013, 0(4): 74-80.
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