INFLUENCE OF Ce ON FATIGUE CRACK GROWTH OF 2O9O Al-Li ALLOY

Acta Metall Sin

1991, Vol. 27

Issue (2): 75-78 DOI:

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INFLUENCE OF Ce ON FATIGUE CRACK GROWTH OF 2O9O Al-Li ALLOY

CHEN Zheng;LI Mingli;HE Ming Northwestern Polytechnical University; Xi'an

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CHEN Zheng;LI Mingli;HE Ming Northwestern Polytechnical University; Xi'an. INFLUENCE OF Ce ON FATIGUE CRACK GROWTH OF 2O9O Al-Li ALLOY. Acta Metall Sin, 1991, 27(2): 75-78.

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Abstract The nominal fatigue crack growth resistance of alloy 2090 is superiorto that of alloy 7075, which is due to the high crack closure effect, yet the intrin-sic one of alloy 2090 is inferior to that of alloy 7075. By adding trace ot Ce toalloy 2090, both intrinsic fatigue crack growth resistance and crack closure effectmay be simultaneously improved, consequently, the nominal growth resistance ofthe alloy may be notably bettered.

Key words: Al-Li alloy Ce fatigue crack closure effect intrinsic growth resistance

Received: 18 February 1991

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1991/V27/I2/75

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