Paper Title:
Effect of Grain Boundary Microchemistry on IGSCC of Alloy 132 in a Simulated BWR Environment
  Abstract

The effects of cold working and heat treatment on caustic stress corrosion cracking (SCC) of mill annealed (MA) alloy 800M in boiling solution of 50%NaOH+0.3%SiO2+0.3%Na2S2O3 were investigated by means of microstructure examination, tensile test, X-ray stress analysis, SCC testing of C-rings, Auger electron spectroscopy (AES), scanning electron microscopy (SEM) and metallography. The microstructure of alloy 800M under tested conditions was austenite. With a strain of 25% by cold working, the grains of alloy 800M became longer, yield strength (YS) and ultimate tensile strength (UTS) increased, elongation (δ ) decreased, residual stress and the susceptibility to SCC increased. With increasing temperature of heat treatment of alloy 800M with cold working, the grains became bigger , residual stress, YS and UTS decreased and δ increased, the susceptibility to SCC of alloy 800M decreased. In boiling caustic solution, SCC cracks on the surfaces of C-ring specimens polarized potentiostatically at –20mV/SCE initiated from pitting and propagated along grain boundaries. AES analysis indicated that the surface films on MA alloy 800M were enriched in nickel and depleted in iron and chromium.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
986-992
DOI
10.4028/www.scientific.net/KEM.297-300.986
Citation
Y. Takeda, H. Yamauchi, Q. Peng, T. Shoji, "Effect of Grain Boundary Microchemistry on IGSCC of Alloy 132 in a Simulated BWR Environment ", Key Engineering Materials, Vols. 297-300, pp. 986-992, 2005
Online since
November 2005
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: Krzysztof Wolski, N. Marie, V. Laporte, Pascal Berger, M. Biscondi
Abstract:A model Ni-Bi system has been used to investigate intergranular penetration (IGP) phenomenon. All experiments have been done on Ni 26°<110>...
677
Authors: Akio Yonezu, Hideo Cho, Mikio Takemoto
Abstract:This paper discusses the mechanism of chloride SCC of sensitized and non-sensitized Type-304 stainless steel based on the data obtained by...
243
Authors: Yu Dong Fu, Gang Wang, Chen Liu, Qing Fen Li
Abstract:In the present paper, the non-equilibrium grain-boundary segregation of P atom was studied in low alloy steels subjected to a low tensile...
396
Authors: Xin Li Song, Ze Xi Yuan, Juan Jia, Ping He Li, Di Wang, Li Xia Fan
Abstract:The cold roll B-added Ti-IF steel is annealed for different times at 810 oC. The microstructure development is studied by Optical...
320
Authors: A. Roustila, A. Rabehi, M. Souici, J. Chene
Chapter 6: Surface Engineering
Abstract:ZrNi intermetallic compound is used in several application fields due to its very favorable characteristics for the storage of hydrogen. The...
709