Effect of shear cutting on ductility of a dual phase steel
Effect of shear cutting on ductility of a dual phase steel
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DOI：
10.1016/j.engfracmech.2008.10.009
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发表时间：
2009-07-01
影响因子：
5.4
通讯作者：
Pineau, A.
中科院分区：
文献类型：
--
作者：
Dalloz, A.;Besson, J.;Pineau, A.
采用特殊设计的试验装置进行的实验研究和对切割过程的力学有限元分析表明，对于所研究的实验室双相钢，切割涉及正应力三轴性和韧性断裂，主要是由于铁素体-马氏体界面处的空洞形核和结合。对切割后的带材试件进行的拉伸试验表明，由于带材边缘存在损伤，延性大大降低。对含短预裂纹板试件的拉伸试验和力学分析表明，在随后的力学试验中，切割影响区表现为预裂纹状。(C)2008爱思唯尔有限公司。保留所有权利。
Both an experimental investigation with an especially designed setup and a mechanical FE analysis of the cutting process showed that for the laboratory dual phase steel investigated, cutting involves positive stress triaxiality and ductile fracture mainly due to void nucleation and coalescence at ferrite-martensite interfaces. Tensile tests on as-cut strip specimens showed a large reduction in ductility due to the presence of damage on the edges of the strips. Tensile tests on strip specimens containing short precracks and mechanical analysis showed that the cutting affected area behaves as a precrack during subsequent mechanical testing. (C) 2008 Elsevier Ltd. All rights reserved.