Rupture mechanism of GH2984 crept at temperature between 700-750 ℃

Jing Bo Yan, Yue Feng Gu, Yi Min Gao, Fei Sun, Xin Bao Zhao, Ying Ying Dang, Zhen Yang, Hong Fei Yin

研究成果: Article査読


The microstructure evolution and its effect on the properties of GH2984 alloy between 700 and 750 ℃ were investigated. The results show the rupture life is only about 160 h when the alloy was crept at 700 ℃ and 300 MPa. The stress concentration and consequently crack nucleation and propagation are the main reason for failure of the alloy. When the stress decreases, the stress concentration is released by the grain rotation. It inhibits the crack nucleation and thus extends the alloy rupture life obviously. However, accompanied with the grain deformation proceeding, the dynamic recrystallization occurs when the creep temperature increases. This leads to the increases of the alloy creep ductility, but decreases the alloy rupture life because of the lower work hardening extent.

ジャーナルZhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
出版ステータスPublished - 2016 3 1

ASJC Scopus subject areas

  • 凝縮系物理学
  • 金属および合金
  • 材料化学


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