Paper Title:
Degeneration of Primary MC Carbide in a Cast Ni-Base Superalloy
  Abstract

During long-term thermal exposure, the degeneration of primary MC carbide is a diffusion-controlled process. With the element exchange between the primary MC carbide and the γ matrix, three MC degeneration reactions, that is, γ + MC → γ' + M23C6 (Reaction I), MC + γ →η+ M23C6 (Reaction II) and MC + γ →η+ M6C (Reaction III), sequentially operates. Of them Reaction III has never been reported in the previous references and is kinetically most difficulty. It is also shown that the grain boundary MC decomposes much more rapidly than the grain interior MC and that Reaction III is not as often seen at the grain boundary as in the grain interior.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
1301-1304
DOI
10.4028/www.scientific.net/MSF.546-549.1301
Citation
X.Z. Qin, J. T. Guo, C. Yuan, J. S. Hou, H. Q. Ye, "Degeneration of Primary MC Carbide in a Cast Ni-Base Superalloy", Materials Science Forum, Vols. 546-549, pp. 1301-1304, 2007
Online since
May 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Baig Gyu Choi, In Soo Kim, Doo Hyun Kim, Chang Yong Jo
Abstract:MC decompositions during thermal exposure have been investigated in three conventional cast Ni-base superalloys, GTD111, IN738LC, and...
1505
Authors: M. Heydarzadeh Sohi, Mahmoud Nili-Ahmadabadi, A. Bahrami Vahdat, A. Amirsadeghi
Abstract:In this investigation the role of alloying elements on austemperability of heavy section ductile irons was studied. Four different chemical...
481
Authors: Yuan Zhang, Peng Wang, Ji Xiang Li, Shi Wei Yin, Jing Lei Xin
Abstract:A novel path segmentation algorithm for automatic guided vehicle is designed by machine vision technology. Firstly, wiener filter based on...
330
Authors: Qin Xin Ren, Ming You, Yun Bang Yao, Guang Min Wen, Qi Zhou Cai
Abstract:Ductile iron specimens with dimensions of 400mm×400mm ×450mm were prepared by treating the melt with an yttrium-containing nodulizer. The...
73
Authors: Kun Liu, Jing Xian Tian, Yan Yan Li
Chapter 6: Industrial and Civil Engineering
Abstract:Three L-shaped columns with HRB500 reinforcement were tested under low cyclic loading. The effect of stirrup ratios on damage characteristic,...
947