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Acta Metall Sin  2005, Vol. 41 Issue (11): 1190-1194     DOI:
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Liquid structure and melt treatment of M963 CAST Ni base superalloy
YIN Fengshi; GUAN Hengrong; SUN Xiaofeng$; HU Zhuangqi
Institute of Metal Research; The Chinese Academy of Sciences;School of Machinery Engineering; Shandong University of Technology
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YIN Fengshi; GUAN Hengrong; SUN Xiaofeng$; HU Zhuangqi. Liquid structure and melt treatment of M963 CAST Ni base superalloy. Acta Metall Sin, 2005, 41(11): 1190-1194 .

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Abstract  The liquid structure and melt treatment of M963 Ni base superalloy have been studied by using high temperature X-ray diffraction. The results show that there exist Ni3Al-like cluster and residual MC carbide in the alloy melt superheated at 1520℃, and the liquid structure of the M963 superalloy has a close relationship to the thermal history of the alloy melt. Both the rupture life and elongation of M963 superalloy at 975℃ under 225 MPa are all prolonged obviously by melt treatment at 1550-1650℃. The commercial MgO crucible is unsuitable for high temperature treatment of melt at 1850℃, but by using a new developed crucible such treatment can carry out and can obviously increase the rupture property of the recycled M963 superalloy at 975℃ and 225 MPa.
Key words:  Ni base superalloy      liquid structure      melt treatment      
Received:  30 June 2005     
ZTFLH:  TG132.3  

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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I11/1190

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