Effect of cryogenic treatment on the mechanical properties of 4340 steel

被引：219
|
作者：
Zhirafar, S.
Rezaeian, A.
Pugh, M.
机构：
[1] Concordia Univ, Dept Mech Engn, Montreal, PQ H3G 1M8, Canada
[2] McGill Univ, Dept Min Met & Mat Engn, Montreal, PQ H3A 2T5, Canada
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2007年 / 186卷 / 1-3期
关键词：
cryogenic; neutron diffraction; steel (4340); mechanical properties; fatigue;
D O I：
10.1016/j.jmatprotec.2006.12.046
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This experimental study investigated the effects of cryogenic treatment on the mechanical properties and microstructures of AISI 4340 steel. Mechanical tests, including rotating fatigue, impact and hardness were carried out, after various heat treating conditions and the results were compared. Fracture features of specimens were also compared. It was shown that in general, hardness and fatigue strength of the cryogenically treated specimens were a little higher whereas the toughness of the cryogenically treated specimens was lower when compared to that of the conventionally treated steel. Neutron diffraction showed that the transformation of retained austenite to martensite occurred which, along with possible carbide formation during tempering, is a key factor in improving hardness and fatigue resistance of the cryogenically treated specimens. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：298 / 303
页数：6
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