Microstructure and Its Influence on Mechanical Behaviour of Directionally Solidified DZ38G Superalloy
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG1989年第3期
论文作者：张静华 唐亚俊 于洋 张济山 胡壮麒 廖华清
文章页码：191 - 198
摘 要：<正> The features of microstructure and theirinfluence on mechanical properties onstress-rupture as well as thermal fatigue ofdirectionally solidified DZ38G nickel-base su-peralloy have been investigated.It has beenfound that the contents of carbides on grainboundaries are increased and morphology of γ’-precipitates has been changed after testing.Particularly γ’-precipitates coalesced intoraft-like in morphology perpendicular to theapplied stress-axis have been observed thathas no detrimental effect on the stress-rupturebehaviour.The tendency of σ-formation hasalso been discussed.The σ-phase can be avoidedwhen the process parameters are chosenappropriately during solidification.
张静华，唐亚俊，于洋，张济山，胡壮麒，廖华清
摘 要：<正> The features of microstructure and theirinfluence on mechanical properties onstress-rupture as well as thermal fatigue ofdirectionally solidified DZ38G nickel-base su-peralloy have been investigated.It has beenfound that the contents of carbides on grainboundaries are increased and morphology of γ’-precipitates has been changed after testing.Particularly γ’-precipitates coalesced intoraft-like in morphology perpendicular to theapplied stress-axis have been observed thathas no detrimental effect on the stress-rupturebehaviour.The tendency of σ-formation hasalso been discussed.The σ-phase can be avoidedwhen the process parameters are chosenappropriately during solidification.
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