RESEARCH ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A NEW WROUGHT SUPERALLOY

Acta Metall Sin

2008, Vol. 44

Issue (5): 540-546 DOI:

Research Articles

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RESEARCH ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A NEW WROUGHT SUPERALLOY

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北京科技大学

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;. RESEARCH ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A NEW WROUGHT SUPERALLOY. Acta Metall Sin, 2008, 44(5): 540-546 .

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Abstract The microstructure of a new wrought superalloy under standard heat treatment condition was studied by means of thermodynamic calculation, optical microscope, scanning electron microscopy, transmission electron microscopy and chemical phase analysis. The main mechanical properties were given for comprehensively understanding the tested alloy. The results indicate that the tested alloy under standard heat treatment condition is composed of equiaxed grains with different sizes. The spheric γ′(Ni3（Al，Ti）) is the main strengthening phase of the alloy and distribute dispersedly in the matrix whose size is very small.Cr23C6 and a few （Ti，Mo）C mainly precipitate on the grain boundaries and some of them precipitate in intracrystalline. Besides, There are very few M6C in the tested alloy. The tested alloy under standard heat treatment condition not only has higher strength but has better plasticity and ductility, has higher creep strength than that of Waspaloy alloy.

Key words: thermodynamic calculation microstructure mechanical properties

Received: 03 July 2007

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TG132.3

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2008/V44/I5/540

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