Lath martensite in 1.4%C ultra-high carbon steel and its grain size effect

被引：12
|
作者：
Zhu, JW
Xu, Y
Liu, YN [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Second NW Inst Natl Minor, Dept Mat, Yinchuan 750021, Peoples R China
[3] Shaanxi Univ Technol, Shaanxi 723000, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 385卷 / 1-2期
关键词：
martensitic phase transformation; slip; twin;
D O I：
10.1016/j.msea.2004.07.002
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
1.4%C ultra high carbon steel (UHCS) was prepared in order to study the substructure of martensite transformation. Because of ultra-fine spherical carbide, the growth of austenite grain, whose average size was 2.5 mum, was prohibited. After quenching, there was a great deal of lath martensite. The sub-structure was composed of a large quantity of dislocations and twins. Through calculation, it was determined that twin shear stress increases faster than that of slip due to the reduction of austenite grain sizes. A model based on twin and slip shear stresses has been proposed, which yields critical grain size ranges from 1-4 mum. The result is in agreement with measured results. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：440 / 444
页数：5
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