EFFECTS OF DYNAMIC STRAIN AGING ON PURE BENDING FATIGUE STRENGTH OF AUSTENITIC STAINLESS STEEL

Acta Metall Sin

1989, Vol. 25

Issue (2): 56-60 DOI:

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EFFECTS OF DYNAMIC STRAIN AGING ON PURE BENDING FATIGUE STRENGTH OF AUSTENITIC STAINLESS STEEL

CHEN Wenzhe;QIAN Kuangwu Fuzhou University

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CHEN Wenzhe;QIAN Kuangwu Fuzhou University. EFFECTS OF DYNAMIC STRAIN AGING ON PURE BENDING FATIGUE STRENGTH OF AUSTENITIC STAINLESS STEEL. Acta Metall Sin, 1989, 25(2): 56-60.

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Abstract DSA pre-treatment processes increase remarkably the fatigue strengthand the strenthening effects increase with increasing prestrain temperature and pre-strain. TBM observation shows that the uniform and stable dislocation networkswith high density form after DSA pre-treatment, which suppress effectively the in-ititation and propagation of fatigue crack and increase the fatigue strength.

Key words: dynamic strain aging (DSA) austenitic stainless steel fatigue strength

Received: 18 February 1989

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