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Influence of Ni5Zr Particles on Fatigue Property of Ni3Al Alloy

Published online by Cambridge University Press:  22 February 2011

Gang Li ,
Jian-Ting Guo  and
Zhong-Guang Wang
Gang Li
Affiliation:
State Key Laboratory of Fatigue and Fracture for Materials, Institute of Metal Research, Academia Sinica, Shenyang 110015, P. R. China
Jian-Ting Guo
Affiliation:
State Key Laboratory of Fatigue and Fracture for Materials, Institute of Metal Research, Academia Sinica, Shenyang 110015, P. R. China
Zhong-Guang Wang
Affiliation:
State Key Laboratory of Fatigue and Fracture for Materials, Institute of Metal Research, Academia Sinica, Shenyang 110015, P. R. China
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Abstract

In this investigation, the influence of second phase particles on high cycle fatigue behavior of Ni3Al alloy is studied. A single phase Ni3Al-B alloy and a Ni3Al-B/Zr alloy with a few second phase particles (Ni5Zr) at the grain boundaries are selected for investigation. High cycle fatigue tests at room temperature with R (minimum stress/maximum stress) 0.1 are conducted in air and at 30 Hz. The results show that the second phase particles are detrimental to high cycle fatigue resistance. It may be explained in terms of the second phase particles promoting fatigue crack initiation. The characteristics of fracture surfaces are examined by Scanning Electron Microscopy (SEM).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 363
Copyright
Copyright © Materials Research Society 1995

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