Deformation-induced martensitic transformation behavior in cold-rolled and cold-drawn type 316 stainless steels
Deformation-induced martensitic transformation behavior in cold-rolled and cold-drawn type 316 stainless steels
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DOI：
10.1016/j.actamat.2009.10.004
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发表时间：
2010-02-01
期刊：
影响因子：
9.4
通讯作者：
Takaki, Setsuo
中科院分区：
文献类型：
--
作者：
Nakada, Nobuo;Ito, Hidetoshi;Takaki, Setsuo
研究了316不锈钢冷轧和冷拔试样的形变诱发马氏体相变行为。形变诱发马氏体优先在奥氏体基体和形变孪晶之间的孪晶界处成核。在冷轧试样中，在孪晶界处形成的马氏体与奥氏体基体和变形孪晶两者具有Kurdjumov-Sachs（K-S）关系（“双K-S关系”）。在冷拉试样中，通常形成具有不同孪晶面的两种变形孪晶，因此在变形孪晶边界相交处形成变形诱发马氏体：马氏体因此与奥氏体基体和两种变形孪晶具有不完美的“三重K-S关系”。奥氏体和马氏体晶粒间复杂的晶体学取向关系强烈地限制了形变诱发马氏体某些变体的形成。由于冷拔和冷轧试样中马氏体形核点数目的不同，前者的马氏体相变比后者更强烈。(C)2009 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
We investigate deformation-induced martensitic transformation behavior in cold-rolled and cold-drawn specimens of type 316 stainless steel. Deformation-induced martensite preferentially nucleates at the twin boundary between the austenite matrix and a deformation twin. In the cold-rolled specimen, martensite formed at the twin boundary has a Kurdjumov-Sachs (K-S) relationship with both the austenite matrix and the deformation twin ("double K-S relationship"). In the cold-drawn specimen, two kinds of deformation twins with different twin planes are typically formed, and therefore deformation-induced martensites are formed where the deformation twin boundaries intersect: martensite thus has an imperfect "triple K-S relationship" with the austenite matrix and the two deformation twins. The complicated crystallographic orientation relationship between austenite and martensite grains strongly restricts the formation of some variants of deformation-induced martensites. Because of the difference in number of nucleation sites in the cold-drawn and cold-rolled specimens, martensitic transformation is more enhanced in the former than in the latter. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.