表面马氏体中的变体选择

Variant selection in surface martensite.

作者信息

Baur Annick P, Cayron Cyril, Logé Roland E

机构信息

Laboratory of Thermomechanical Metallurgy-PX Group Chair, Ecole Polytechnique Fédérale de Lausanne, Switzerland.

出版信息

J Appl Crystallogr. 2017 Oct 20;50(Pt 6):1646-1652. doi: 10.1107/S160057671701398X. eCollection 2017 Dec 1.

DOI:10.1107/S160057671701398X

PMID:29217991

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5713143/

Abstract

A significant variant selection is reported in isothermal martensite formed on the surface of an Fe-30% Ni sample. The selection phenomenon is modelled using different descriptions of the martensitic phase transformation. In particular, matrices based on the phenomenological theory of martensite crystallography, the Jaswon and Wheeler distortion, and the continuous face centred cubic-body centred cubic distortion are compared. All descriptions allow good predictions of the variant selection. However, the Jaswon and Wheeler distortion and the continuous distortion better account for other features of the surface martensite, such as the {225} habit plane and the accommodation mechanism by twin-related variant pairing.

摘要

据报道，在Fe-30%Ni样品表面形成的等温马氏体中存在显著的变体选择。利用马氏体相变的不同描述对这种选择现象进行了建模。特别地，比较了基于马氏体晶体学唯象理论、贾斯旺和惠勒畸变以及连续面心立方-体心立方畸变的矩阵。所有描述都能很好地预测变体选择。然而，贾斯旺和惠勒畸变以及连续畸变能更好地解释表面马氏体的其他特征，如{225}惯习面和孪晶相关变体配对的协调机制。