ZHANG Yuanhu ZHANG Yun HU Gengxiang Shanghai Jiaotong University
,
Shanghai
,
China
金属学报(英文版)
An investigation was made on the creep crack growth behaviour under static load at 1023 K for Ni-base superalloy GH30 exposed to air and air+10% SO_2.The results showed that in the region of low stress intensity factor,the creep crack growth rate is higher in air+10% SO_2 than in air only,while in the high region,it is reverse.The fractograph of specimens has been analyzed,and the mechanism of creep crack growth together with the influences of sul- phur and oxygen has been discussed as well.
关键词:
Ni-base superalloy
,
null
,
null
,
null
