摘要
研究了高强度结构钢典型强化组织板条马氏体、粒状贝氏体和板条马氏体加粒状贝氏体混合组织的韧性启裂.结果表明;高强度结构钢的韧性启裂依赖于强度、塑性和形变硬化能力,表现为裂纹尖端应力应变场中消耗的弹性应变能和塑性形变功不同.其相对量可用无量纲参量H表示,并与材料的流变应力有较好的对应关系.
It has investigated the ductile crack initiation for typical microstructure of high strength structure sleels,such as Low-carbon martensite, granular bainite,comples structure composed of some added small quantities of granular bainite in the martensite matrix. The experimental results show that the ductile crack initation of high strength structure steels depends on the strength,ductility and deformation hardening ability because the elastic strain energy and plastic deformation work absorbed in the stress strain field of crack tip are various. The nun dimensional parameter H can be used to compare the elastic strain energy component with the plastic deformation work componen-t,and it decreases linearly with the flow stress of material.
出处
《理化检验（物理分册）》
CAS
1994年第6期16-18,28,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
韧性启裂
形变功
裂纹尖端
Ductile crack initiation Deformation work Low-carbon martensite Granular bainite Flow stress
