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Substructure Formation around Fatigue Cracks and Its Role in the Propagation of Fatigue Cracks in Aluminium
Transactions of the Japan Institute of Metals
Polycrystalline aluminium specimens of 99.93% purity were fatigued in alternate tension and compression with zero mean stress. Substructures near the tip of fatigue cracks ware examined at various stages of crack propagation using an X-ray micro-beam technique. The propagation rate of the fatigue crack was also measured by a replicating method. The main results obtained are as follows. (1) Regardless of the intensity of fatigue stress and the length of fatigue cracks, there exists a plasticdoi:10.2320/matertrans1960.13.428 fatcat:xznxywlgbbct7e7z2e2kh2guym