Fracture toughness of the materials in welded joint of X80 pipeline steel
Fracture toughness of the materials in welded joint of X80 pipeline steel
复制标题
X80管线钢焊接接头材料的断裂韧性
DOI：
10.1016/j.engfracmech.2015.07.061
复制
发表时间：
2015-11-01
影响因子：
5.4
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Yang, Yonghe;Shi, Lei;Wang, Xin
研究了X80管线钢焊接接头不同部位材料的室温组织、力学性能和断裂韧性。对焊接材料和母材的裂纹尖端张开位移(CTOD)和J积分进行了弹塑性断裂韧性测试。研制了一种新型的非接触式双卡尺测量系统，并将其应用于断裂韧性试验。结果表明，熔合区(FZ)是X80钢焊接件的断裂危险区，由于焊接硬化和脆化，硬脆马氏体-奥氏体组分(M-A)的出现是重要的。(C)2015爱思唯尔有限公司。保留所有权利。
The microstructures, mechanical properties and fracture toughness of the materials in different locations of the welded joint of the X80 pipeline steel were studied at room temperature. Elastic-plastic fracture toughness testing of crack tip opening displacement (CTOD) and J-integral of the welding materials and base material were conducted. A new non-contact double-clip gauge measuring system was developed and used in the fracture toughness tests. It was observed the fusion zone (FZ) was the fracture risk zone of the X80 steel weldment; and the occurrence of hard-brittle martensite-austenite (M-A) constituents was a significant because of welding hardening and embrittlement. (C) 2015 Elsevier Ltd. All rights reserved.