THRESHOLD OF SHORT FATIGUE CRACK FOR 8090 Al-Li ALLOY

Acta Metall Sin

1990, Vol. 26

Issue (5): 62-65 DOI:

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THRESHOLD OF SHORT FATIGUE CRACK FOR 8090 Al-Li ALLOY

CHEN Zheng Northwestern Polytechnical University; Xi'an

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CHEN Zheng Northwestern Polytechnical University; Xi'an. THRESHOLD OF SHORT FATIGUE CRACK FOR 8090 Al-Li ALLOY. Acta Metall Sin, 1990, 26(5): 62-65.

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Abstract Threshold of short through fatigue crack for an Al-Li 8090 alloy wasevaluated to be lower than that of long crack, and to decrease with the shorteningof the crack length. The correlation among the threshold, crack wake and crack tipshielding of the short fatigue crack was discussed. The critical length and lowesttheoretical threshold of short through fatigue crack were presented.

Key words: Al-Li alloy short fatigue crack threshold crack closure effect crack tip shielding crack wake

Received: 18 May 1990

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1990/V26/I5/62

1 Nicholls D J, Martin J W. Aluminum-Lithium Alloy, Birmingham (UK): Material and Component Enginerring Publication Ltd, 1989: 1002
2 Venkateswara Rao K T, Yu W, Rithie R O. Metall Trans, 1988; 19A: 563
3 Birt M J, Beevers C J. ALuminum-Lithium Alloy, Birmingham (UK): Material and Component Engineering PublicationLtd, 1989: 983
4 Venkateswara Rao K T, Yu W, Rithie R O. Metall Trans, 1988; 19A: 549/

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