金属学报  1989, Vol. 25 Issue (4): 60-66

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淬火高碳马氏体沿晶断裂机制

刘宗昌

包头钢铁学院

MECHANISM OF INTERGRANULAR FRACTURE OF AS-QUENCHED MARTENSITE IN HIGH CARBON STEELS

LIU Zongchang Baotou Iron and Steel University

刘宗昌. 淬火高碳马氏体沿晶断裂机制[J]. 金属学报, 1989, 25(4): 60-66.
. MECHANISM OF INTERGRANULAR FRACTURE OF AS-QUENCHED MARTENSITE IN HIGH CARBON STEELS[J]. Acta Metall Sin, 1989, 25(4): 60-66.

摘要 参考文献 相关文章 Metrics 全文: PDF(2519 KB)   摘要: 提出马氏体沿晶断裂机制:粗大奥氏体晶粒转变为马氏体时,以晶粒为体积膨胀单元,必然产生不均匀应变,在晶界区形成显微局部应力,甚至产生应力集中,削弱晶界结合,有时出现微裂缝,在淬火第一类应力(或外力)作用下,形成沿原奥氏体晶界扩展的沿晶裂纹和冰糖状断口。 关键词 ： 淬火马氏体,  沿晶断裂,  不均匀应变     Abstract：A mechanism of intergranular fracture of as-quenched martensite inhigh carbon steels has been proposed. When coarse grains of austenite transform tomartensite, the grain plays a role of the unit of volume dilation, inhomogeneousstrains necessarily produce and local microscopic stress concentrations create at grainboundaries. This reduces the integration of the grains, sometimes intergranutarcracks may produce. Under the action of first kind hardening stress or externalforce, the intergranular cracks propagated along the grain boundaries will form.This results in the candy-like fracture. Key words： as-quench martensite    intergranular fracture    inhomogeneous strain 收稿日期: 1989-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 刘宗昌 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1989/V25/I4/60 1 #12 2 Ogura T. Trans Jpn Inst Met, 1981; 22: 109 3 Brant C L, Banerji S K. Int Metals Rev, 1978: 23 (4) : 164 4 刘宗昌.理化检验(物理分册),1985;19(6) :1 5 贡海.金属热处理,1982;(3) :1 [1] 肖纪美. 抗断裂的材料设计[J]. 金属学报, 1997, 33(2): 113-125. Viewed Full text Abstract Cited   Shared      Discussed