Strain-rate sensitivity of hardness of nanocrystalline Ni_(75 at. percent)Al_(25 at. percent) alloy film

A.H.W. Ngan; J.B. Pethica; H.P. Ng

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Strain-rate sensitivity of hardness of nanocrystalline Ni_(75 at. percent)Al_(25 at. percent) alloy film

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Room-temperature indentation experiments carried out on nanocrystalline Ni_(75 at. percent)Al_(25 at. percent) percent alloy films with a range of grain sizes revealed that the strain-rate sensitivity of hardness is nearly zero and that the hardness increases as grain size decreases. The strain-rate insensitivity of hardness indicates that the room-temperature strength of these alloy films is dominated by an athermal, strain-rate-insensitive component. The hardness of the films was found to be in the range of 2.4 to 3.3 GPa, depending on grain size.

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《Journal of Materials Research》 |2003年第2期|382-386|共5页
作者
A.H.W. Ngan; J.B. Pethica; H.P. Ng;
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作者单位

Department of Mechanical Engineering, University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
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Strain-rate sensitivity of hardness of nanocrystalline Ni_(75 at. percent)Al_(25 at. percent) alloy film

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