HIGH TEMPERATURE TENSILE FRACTURE BEHAVIOR OF   ORIENTED DD100 SINGLE CRYSTAL SUPERALLOY

Acta Metallurgica Sinica (English Letters) ›› 1999, Vol. 12 ›› Issue (1): 124-129.

HIGH TEMPERATURE TENSILE FRACTURE BEHAVIOR OF ORIENTED DD100 SINGLE CRYSTAL SUPERALLOY

Author C.D. Zhou1,2), J.X. Yu1), X.P. Dong1), Y.H. Zhang1), C.Q. Sun3) and T.F. Li4) 1) The State Education Commission Open Research Laboratory for High Temperature Materials and Testing, Shanghai Jiao Tong University, Shanghai 200030, China2) Shanghai Enhanced Lab of Ferrometallurgy, Shanghai University, Shanghai 200072, China3) Institute of Aeronautical Materials, Beijing 100095, China 4) Institute of Corrosion and Protection of Metals, The Chinese Academy of Sciences, Shenyang 110015, ChinaManuscript received 18 October 1998

Received:1999-02-25 Revised:1999-02-25 Online:1999-02-25 Published:2009-10-10

Abstract

Abstract: An investigation has been made on the tensile fracture behavior of oriented single crystal DD100 superalloy at 850. The appearance of the fracture surface of DD100 reflects the glide plane decohension fracture mechanism, which is different from the fracture of oriented DD100. The tensile strength and elongation are lower than the oriented DD100. Oxygen in air has little effect on the strength of DD100 but reduces the tensile elongation obviously. Oxygen does not affect the fracture mode of DD100 but strongly accelerates the process of fracture.

Key words: single crystal superalloy, high temperature fracture, environmental effect

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HIGH TEMPERATURE TENSILE FRACTURE BEHAVIOR OF ORIENTED DD100 SINGLE CRYSTAL SUPERALLOY

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