The rapid development of advanced aero-engine and industry gas turbine requires high performance of single crystal (SX) blade. Spiral selector is very important to produce SX blade, which includes starter block and spiral part. In this research, grain density changing and orientation deviating as the height of grain growth (the distance between section studied and the undersurface of the sample) increasing were studied by the experiment and simulation, and the designing rules for the starter block were given out. EBSD orientation mapping technology was used to get grains’ morphology and orientation. Mathematical and physical models were built for the directional solidification process. Adopting CA-FD method, the 3D macro temperature field of solidification process was calculated as well as grain growth. The properties of grains competitive growth and evolution process during directional solidification in starter block were analyzed based on macro and micro modeling results, and rules for grains competitive growth was explained, which provided theoretical supports for designing starter block.
. THE SIMULATION AND EXPERIMENTAL STUDIES ON GRAIN SELECTION BEHAVIOR OF SINGLE CRYSTAL SUPERALLOYPARTⅠ. STARTER BLOCK OF GRAIN SELECTOR. Acta Metall Sin, 0, 0(0): 0-0.
CHE Yunyi; LIU Fendi; ZENG Guiyi; XU Yuchang; JI Jingwen (College of Sciences; Northeastern Univerisity; Shenyang 110006)HUA Qiaozhu; LIU Jianmin; HUANG Zhenru(Institute of Iron & Steel; Baoshan Iron & Steel Company; Shanghai 201900)Correspondent: JI Jingwen; professor; Tel: (024)25915148; Fax: (024)23891072;E-mail: cos ramm. cneu. edu. cn.. Snoek-K■-kster DAMPING IN 340 MPa BAKE HARDENING STEELS[J]. Acta Metall Sin, 1998, 34(8): 831
-835
.
HUANG Zongze;XIAO Hingguo;XIAO Zeqiang(Northeastern University; Shenyang 110006); S. D. SINGH(National Metallurgical Laboratory; Jamshedpur; India;831007) (Manuscript recieved 1995-06-29). FOAMING BEHAVIOUR AND PARAMETERS OF FeO-BEARING SLAGS[J]. Acta Metall Sin, 1996, 32(3): 278
-283
.
[9]
KANG Zengqiao;GAI Xiuying;LI Jiabao;WANG Zhongguang State Key Laboratory for Fatigue and Fracture of Materials Institute of Metal Research; Academia Sinica; shenyang Correspondent research assistant; Institute of Metal Research; Academia Sinica; Shenyang 110015. INFLUENCE OF RESIDUAL STRESS AND SURFACE MORPHOLOGY ON FATIGUE PROPERTIES OF 60Mn STEEL[J]. Acta Metall Sin, 1992, 28(6): 40
-46
.