Affiliation:
1. University of Toyama
2. Southwest Jiaotong University
Abstract
Gigacycle fatigue behavior in high-strength steels tested under rotary bending fatigue
was summarized in this paper. Characteristic of the very high cycle fatigue is to be caused the
transition of fracture mode from surface-induced fracture to subsurface inclusion-induced one. In
the vicinity of an inclusion at the origin of internal crack, granular-bright-facet (GBF) area was
formed during extremely long fatigue cycles. It was pointed out that the formation of GBF area was
an important factor for the control of the internal fatigue fracture in gigacycle regime. The GBF
area revealed a very rough granular morphology compared with the area outside the GBF inside the
fish-eye zone, and was related to the carbide distribution in the microstructure of the matrix. From
the detailed observation of fracture surface and computer simulation by FRASTA method, the GBF
area formation mechanism in a gigacycle fatigue regime was proposed as the ‘dispersive
decohesion of spherical carbide model’.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference33 articles.
1. First international conference was held as Fatigue life in the gigacycle regime", 1998 in Paris. The Second; "Fatigue in the very high cycle regime", 2001 in Vienna, the Third; "Very high cycle fatigue (VHCF-3)", 2004 in Kyoto/Kusatsu, and the Fourth; "Very high cycle fatigue (VHCF-4), 2007 in Ann Arbor, Michigan.
2. Q.Y. Wang, Y. Berard, A. Dubarre, G. Baudry, S. Rathery and C. Bathias: Fatigue Fract. Engng. Mater. Struc. Vol. 22-7(1999), pp.667-672.
3. Y. Murakami, T. Nomoto and T. Ueda: Fatigue Fract Engng Mater Struc. Vol. 22-7(1999), pp.581-590.
4. Y. Murakami, T. Nomoto and T. Ueda, Y. Murakami, M. Ohori: J. Soc. Mater. Sci. Jpn Vol. 48 -10(1999), pp.1112-1117.
5. Y. Murakami, M. Takada and T. Toriyama: Int. J. Fatigue Vol. 20-9(1998), pp.661-667.
Cited by
27 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献