韩国明,李飞,陈晓燕,李玉龙,王飞,汪东红,孙宝德.镍基变形高温合金中g′ 相的多尺度分布行为及其对热变形性能的影响[J].稀有金属材料与工程,2019,48(9):2821~2828.[Han Guoming,Li Fei,Chen Xiaoyan,Li Yulong,Wang Fei,Wang Donghong,Sun Baode.Multimodal distribution of g′ phase and effect on hot deformation in a wrought nickel base superalloy[J].Rare Metal Materials and Engineering,2019,48(9):2821~2828.]
镍基变形高温合金中g′ 相的多尺度分布行为及其对热变形性能的影响
投稿时间:2018-04-16??修订日期:2018-10-22
中文关键词:??变形高温合金??γ"相??热处理??热变形
基金项目:Aerospace Support Fund (Grant No. 15GFZ-JJ20-04), the Industry-University-Research Cooperation Annual Plan of Shanghai under Project No. CXY-2016-004 and China Postdoctoral Science Foundation 17Z102060125
中文摘要:
??????本文主要研究了镍基变形高温合金在不同热处理过程中g′相的析出、形貌、尺寸及分布行为。通过扫描电镜观察分析高温固溶热处理后连续冷却、中断固溶冷却以及等温时效淬火后的组织构成。研究结果表明,固溶处理后连续冷去过程中,当冷却速率较高时,二次g′尺寸大小均匀,呈现单峰分布,随着冷却速率降低,二次g′尺寸增加,逐渐聚集长大并呈现花状形貌;当等温时效过程中二次g′周围过冷度重新建立,随后淬火过程中会产生三次g′,三次g′与二次g′构成双峰分布。在此基础上,探讨了g′相析出及演化对合金热变形行为的影响。
Multimodal distribution of g′ phase and effect on hot deformation in a wrought nickel base superalloy
英文关键词:wrought superalloy, ?g′ precipitate, heat treatment, hot deformation
英文摘要:
??????The microstructural evolution of different generations of ?′ precipitates during various heat treatment processes of a nickel base superalloy has been investigated. After solutionizing in the single ? phase field, continuous cooling, interrupted cooling and isothermal annealing tests were performed and characterization of the precipitates was carried out by scanning electron microscopy. It is found that a monomodal size distribution of the secondary ?′ precipitates can be achieved at a very high cooling rate in the continuous cooling process. With the decrease of the cooling rate, the secondary ?′ precipitates grow gradually and gather together to form a flowery morphology. When the secondary supersaturation is developed in the vicinity of the secondary ?′ precipitates during isothermal annealing, the water-quenched tertiary ?′ precipitates are produced and result in a bimodal size distribution of ?′ precipitates with the larger secondary precipitates. Furthermore, the effects of the secondary ?′ particle growth on the hot deformation are also discussed.
作者单位E-mail
韩国明?上海交通大学?gmhan@sjtu.edu.cn?
李飞???
陈晓燕?上海交通大学??
李玉龙?中国航发商用航空发动机有限责任公司??
王飞?上海交通大学??
汪东红?上海交通大学??
孙宝德?上海交通大学??
摘要点击次数:?55
全文下载次数:?28
查看全文??查看/发表评论??
关闭