INFLUENCE OF STRESS ON COMPOSITION OF OXIDE SCALE IN Ni_3Al ALLOYS

Acta Metall Sin

1993, Vol. 29

Issue (10): 73-75 DOI:

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INFLUENCE OF STRESS ON COMPOSITION OF OXIDE SCALE IN Ni_3Al ALLOYS

JIN Cheng;LIN Dongliang Shanghai University of Technology Shanghai Jiaotong University

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JIN Cheng;LIN Dongliang Shanghai University of Technology Shanghai Jiaotong University. INFLUENCE OF STRESS ON COMPOSITION OF OXIDE SCALE IN Ni_3Al ALLOYS. Acta Metall Sin, 1993, 29(10): 73-75.

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Abstract Influence of tensile stress on the composition of surface oxides on the alloysNi-23Al-0.5Zr-0.1B and Ni-17Al-8Cr-0.5Zr-0.1B(at.-%) was studied. NiO content inthe oxide scale may increase obviously under tensile stress. Thermodynamic analyses showsthat, during oxidation, the volume expansion of Ni and Al are different, and the tensile stressmay influence the enrichment of NiO in oxide scales so as to reduce the elastic deformationenergy.

Key words: Ni_3Al alloy oxidation stress

Received: 18 October 1993

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1993/V29/I10/73

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