Drexler Elizabeth S, Slifka Andrew J, Amaro Robert L, Sowards Jeffrey W, Connolly Matthew J, Martin May L, Lauria Damian S
Applied Chemical and Materials Division, National Institute of Standards and Technology, Boulder, CO 80305, USA.
Department of Mechanical Engineering, University of Alabama, Tuscaloosa, AL 35487, USA.
J Res Natl Inst Stand Technol. 2019 Apr 26;124:1-19. doi: 10.6028/jres.124.008. eCollection 2019.
Several welds and associated heat-affected zones (HAZs) on two API X70 and two API X52 pipes were tested to determine the fatigue crack growth rate (FCGR) in pressurized hydrogen gas and assess the area of the pipe that was most susceptible to fatigue when subjected to hydrogen gas. The relationship between FCGRs for welds and HAZs compared to base metal is discussed relative to local residual stresses, differences in the actual path of the crack, and hydrogen pressure effects.
对两根API X70和两根API X52管道上的若干焊缝及相关热影响区（HAZ）进行了测试，以确定加压氢气中的疲劳裂纹扩展速率（FCGR），并评估管道在氢气作用下最易发生疲劳的区域。相对于局部残余应力、裂纹实际路径的差异以及氢气压力效应，讨论了焊缝和热影响区与母材的疲劳裂纹扩展速率之间的关系。
