The Effects of Hydrogen on Mechanical Properties of Ni-base Alloys under the Static and Cyclic Loading

摘要：

　　The effect hydrogen on short-term strength,low-cycle durability and plane-stress fracture toughness of 04Cr16Ni56 and 05Cr19Ni55 alloys at pressure up to 35 MPa and temperature 293…1073 K was investigated.The modes of hydrogen action for which the mechanical properties of alloys are minimum were established: hydrogen pressure above 10 MPa (non-hydrogenated specimens of 04Cr16Ni56 alloy) and above 35 MPa (hydrogenated specimens of 05Cr19Ni55 alloy,hydrogen concentration CH = 19 wppm).The plane-strain state conditions and,correspondingly,the conditions of the evaluation of plane-strain fracture toughness (K?с) were fulfilled on compact tension specimens of 04Cr16Ni56 with a thickness of 20 mm at hydrogen pressure above 10 MPa in the temperature range 293…473 K.Plane-stress fracture toughness Kc of 05Cr19Ni55 alloys was decreased at 293 K from 116 MPa·m1/2 in helium to 78 MPa·m1/2 in hydrogen under the pressure 30 MPa and to 68 MPa·m1/2 in hydrogen under the pressure 30 MPa after preliminary high-temperature hydrogenation (with hydrogen concentration CH = 19 wppm).

关键词： Hydrogen embrittlement Fracture toughness Alloy

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-7

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）