Z.F. Peng
,
Y Y Ren
,
B.Z. Fan
,
J. W Qin
,
P. Yan
,
J. C. Zhao
,
Y Q. Wang and J.H. Sun (Wuhan University of Hydraulic and Electric Engineering
,
Wuhan 430072
,
China)(Central Iron and Steel Research Institute
,
Beijing 100081
,
China)
金属学报(英文版)
Prolonged tension tcsts were caTried out by comblning elevated temperatures with declined stresses over thc range of 760-1050° C and 780-115MPa. The effects of temperature and applied stress on rupture life, and the relations of temperuture, applied stress and mpture life to characteristic dimensions of coherent phases (γ matrix channel width and mpcd γ precipitate thickness), and to the elongation as well as to the cross sectional area reduction of thc tested specimens were investigated. Under all testing conditions, longittLdinal coalescence of seveml adjacent armys of γ precipitates could occur to dtherent extents along the direction of the applied stress axis in addition to their normal directional coarsening. The extent of γ Longitudinal coalescence became increased and its morphology tended to be irmpular with the increase of temperuture although the applied stresses were relatively lower.
关键词:
superalloy CMSX-2
,
null
,
null
,
null
Xiliang NIE
,
Yumei ZHOU
,
Lieping ZHONG and Dingsheng WANG(Lab. for Surface Physics
,
Institute of Physics
,
Chinese Academy of Sciences
,
Beijing 100080
,
China)Renhui WANG(Dept. of Physics
,
Wuhan University
,
Wuhan 430072
,
China)Yiying YE(Center of Instrument
材料科学技术（英文）
An accurate and simple model of stacking fault energy for alloys (solid solutions) has beendeveloped based on the embedded-atom method. The calculated value of stacking fault energy35 mJ/m2 for 304 austenitic stainless steel, is in a good agreement with the experimental one,30 mJ/m2. In the present model we find that the Hirth's empirical relationship is also suitablefor alloy.
关键词:
