金属学报  1994, Vol. 30 Issue (12): 551-554

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镍基高温合金在时效过程中γ'枝晶生长形态及机制

于熙泓;张静华;胡壮麒

中国科学院金属研究所

GROWTH MORPHOLOGY OF γ'-DENDRITE DURING HIGH TEMPERATURE AGEING OF Ni-BASE SUPERALLOY

YU Xihong;ZHANG Jinghua;HU Zhuangqi (Institute of Metal Research;Chinese Academy of Sciences; Shenyang)

于熙泓;张静华;胡壮麒. 镍基高温合金在时效过程中γ'枝晶生长形态及机制[J]. 金属学报, 1994, 30(12): 551-554.
, , . GROWTH MORPHOLOGY OF γ'-DENDRITE DURING HIGH TEMPERATURE AGEING OF Ni-BASE SUPERALLOY[J]. Acta Metall Sin, 1994, 30(12): 551-554.

摘要 参考文献 相关文章 Metrics 全文: PDF(292 KB)   摘要: 在Ｒｅｎｅ＇Ｎ４单晶镍基高温合金的高温时效过程中，发现γ＇粒子由立方形逐渐形成梅花状、并继续演变成枝晶形态，同时γ＇枝晶具有择域生长特性．公式推导证明，γ＇粒子的生长尺寸有一临界值α＇超过这一临界值后，γ＇粒子将通过错配位错造成粒子周边凹陷，以协调γ＇能量的增加，并进一步发展为枝晶状． 关键词 ： 高温时效,  γ＇枝晶生长,  临界尺寸,  位错协调,  Ｒｅｎｅ＇Ｎ４合金     Abstract：The morphology of γ' precipitate changed from cubic to flower like dendritic shape during high temperature ageing for a Rene'N4 single crystal Ni-base superalloy.The dendritic growth of γ' precipetate was of the selection area characteristic. The analysis results indicated that there was a critical growth size a* of γ' precipitate.As soon as the size of γ'was larger than the value of a * , the γ' precipitate would hollow and split by dismatch dislocation in order to match the increase of systematic energe of γ' and develop into dendrite.YU Xihong. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015 Key words： high temperature    γ'-dendrite    critical size    dislocation matching.      基金资助:国家自然科学基金 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 于熙泓 张静华 胡壮麒 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1994/V30/I12/551 1GabbTP,GardaJ,MminerRV．MetallTrans,1986;19A:4972Mever-ClberslebenF,GoldschmidtD,Rezai-AriaF．In:AntolovichSDetaleds．,Superalloys1992,TheMinerals,MetalsMaterialsSociety,1992:7853YeomSJ,YoonDV,HenryMF．MetallTrans,1993;24:19754HenryNF,YooVS,YoonDV,ChoiJ．metallTrans,1993;24A:17335DoiM,MiyazakiT,WakatsukiT．MaterSciEng,1985;74:1396PorterDA,EasterlingKE著．李长海,余永宁译．金属和合金中的相变．北京:冶金工业出版社,1988:1447胡汉起著．金属凝固．北京:冶金工业出版社,1985:738MiyazakiT,ImamuraH,MoriH,KozakaiT．JMaterSci,1981;16:1197 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed