Effects of HIP Process on the Microstructure and Mechanical Properties of a Cast Superalloy

Abstract:

The effects of HIP process on microstructure and mechanical properties of IN792 cast superalloy were studied. The results showed that HIP process produced more uniform and finer cubic γ′ than standard heat treatment. The difference of the mechanical properties should be caused by the microstructure changes. HIP process leads the homogeneous distribution of γ′ at dendritic arm and interdendritic area, and improved UTS and YS of tested alloy at 550°C. However, it played no role in increasing UTS and YS at room temperature and stress-rupture lives of 760°C/662MPa and decreased stress-rupture lives of 982°C/186MPa.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 476-479
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.476
• Online since: June 2017
• Authors: Jin Xia Yang*, Yuan Sun, Dong Ling Zhou
• Keywords: HIP Process, Mechanical Properties, Superalloy

References

[1] Method of improving mechanical properties of alloy parts, US Patent 4, 302, 256.

[2] N. L. Loh and K. Y. Sia, Journal of Material Processing Technology 30 (1992) 45-65.

[3] M. H. Bocanegra-Bernal, Journal of Material Science 39 (2004) 6399-6420.

[4] G. Appa Rao, Mahendra Kumar, M. Srinivas, D. S. Sarma, Materials Science and Engineering A 355 (2003) 114-125.

[5] M. T. Kim, D. S. Kim, O. Y. Oh, Materials Science and Engineering A 480 (2008) 218-225.

[6] M. T. Kim, S. Y. Chang, J. B. Won, Materials Science and Engineering A 441 (2006) 126-134.

[7] J. X. Yang, Q. Zheng, H. Y. Zhang, X. F. Sun, H. R. GuaN, Z. Q. Hu, Materials Science and Engineering A 527 (2010) 1016-1121.