Paper Title:
Microstructures Evolution of a Ni-Base Superalloy after Long-Term Aging at 750°C
  Abstract

The microstructures evolution of a new type Ni-base superalloy has been investigated after long-term aging at 750°C for 2000h. The results indicate that TCP, a harmful phase greatly affects the mechanical properties of the alloy, is un-precipitated in the aging process. γ´ phase is precipitated in two kinds of sizes during long-term aging. The shape of larger one is transit from spherical to cubic with prolonging of aging time. The M23C6 carbide formed mainly by Cr, and other elements such as Al, Ti, Co and Mo is also precipitated in both γ matrix and grain boundaries, and the quantities of the carbide increase gradually with the increasing of aging time.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
387-390
DOI
10.4028/www.scientific.net/MSF.561-565.387
Citation
T. Cui, J. J. Wang, L. Q. Chen, G. P. Zhao, H. C. Yang, "Microstructures Evolution of a Ni-Base Superalloy after Long-Term Aging at 750°C", Materials Science Forum, Vols. 561-565, pp. 387-390, 2007
Online since
October 2007
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