Fatigue crack initiation and early growth in a copper bicrystal with a grain boundary perpendicular to stress axis

Journal Article · Tue Oct 15 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00253-9· OSTI ID:389792

Hu, Y M; Wang, Z G ^[1]

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1. Academia Sinica, Shenyang (China). State Key Lab. for Fatigue and Fracture of Materials

It is evident that the mechanism of grain boundary (GB) fatigue cracking is not well understood and further work in this field is needed. Bicrystals can be regarded as an ideal material to study the behavior of intergranular cracking and the fatigue crack initiation mechanism at GB because the geometry and the orientations of GB can be well designed. In this paper, a copper bicrystal containing two highly misoriented component crystals and an arbitrary GB approximately normal to stress axis was selected as a vehicle for study. The characteristics of fatigue crack nucleation and early growth in this bicrystal will be reported in this paper. This study can be considered as a logical step in the attempt to understand the fatigue behavior of complex technical materials.

• OSTI ID: 389792
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 8 Vol. 35; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BRIDGMAN METHOD
COPPER
CRACK PROPAGATION
CRACKS
FATIGUE
GRAIN BOUNDARIES
GRAIN ORIENTATION
NUCLEATION
SAMPLE PREPARATION
STRAINS
STRESSES