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| EFFECT OF Mg ON CREEP BEHAVIOR OF A Ni-BASE SUPERALLOY |
| by MA Peili; ZHUANG Jingyun; ZHU Jing; YANG Jinyan; ZHONG Zengyong; GAO Liang (Central Iron and Steer Research Institute; Ministry of Metallurgical Industry; Beijing); ZHU Jinyuan; PU Huikang (Shanghai Steel Works No.5) (Manuscript received 25 October; 1985; revised manuscript 25 August; 1986) |
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Cite this article:
by MA Peili; ZHUANG Jingyun; ZHU Jing; YANG Jinyan; ZHONG Zengyong; GAO Liang (Central Iron and Steer Research Institute; Ministry of Metallurgical Industry; Beijing); ZHU Jinyuan; PU Huikang (Shanghai Steel Works No.5) (Manuscript received 25 October; 1985; revised manuscript 25 August; 1986). EFFECT OF Mg ON CREEP BEHAVIOR OF A Ni-BASE SUPERALLOY. Acta Metall Sin, 1987, 23(6): 484-490.
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Abstract Sufficient Mg addition in Ni-base superalloy results in strengthening of γ' phase, consequently decreases the steady state creep rate. Segregation of Mg to grain boundaries(GB) causes raising of GB fracture energy, that retards the crack initiation and propagation, extends the 2nd and 3rd creep stage. Accommodation between deformations at GB and in grains may also be improved by addition of Mg, thus increases the creep ductility. The fracture mechanism transfers from dominantly wedge cracking to cavity cracking.
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Received: 18 June 1987
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2 王迪,徐志超,傅杰,谢锡善,倪克铨,陈国良.高温合金中微量元素Mg经长期时效后的作用,北京钢铁学院研究报告,1983
3 马培立,庄景云,杨锦炎,高良.金属学报,1987;23(3) :A195
4 张迅.镁在镍基高温合金中的分布及对蠕变机制的影响,钢铁研究总院硕士研究生论文,1985
5 韩临光,马培立.钢铁研究总院学报,1986;6(1) :21-25 |
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