新型镍基高温合金GH4720Li固溶处理过程中的晶粒长大行为

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• 英文论文题名：Behavior of Grain Growth for Superalloy GH4720Li during the Solution Treatment Process
• 论文作者：阚志 ; 杜林秀
• 英文论文作者：Kan Zhi ; Du Linxiu ; State Key Laboratory of Rolling and Automation ; Northeastern University
• 年：2015
• 作者机构：东北大学轧制技术及连轧自动化国家重点实验室;
• 论文关键词：GH4720Li ; 显微组织 ; 激活能 ; 固溶处理
• 英文论文关键词：GH4720Li ; microstructure ; activation energy ; solution treatment
• 会议召开时间：2015-05-20
• 会议录名称：第十三届中国高温合金年会论文集
• 英文会议录名称：Proceedings of the 13th China Superalloys Conference
• 语种：中文
• 分类号：TG132.3;TG156.94
• 学会代码：ZGJS
• 会议名称：第十三届中国高温合金年会
• 会议地点：中国北京
• 主办单位：中国金属学会高温材料分会
• 学会名称：中国金属学会
• 页数：4
• 文件大小：1272k
• 原文格式：O
• 会议级别：全国

摘要

本文对GH4720Li合金在1080~1 190℃、保温15~240min固溶处理过程的晶粒长大行为进行了系统的研究。结果表明,GH4720Li合金中γ′相对晶界的"钉扎"作用是晶粒长大的主要阻力,其在1160℃的溶解行为引起晶粒长大速度的显著变化,在两个温度区间,晶粒长大平均激活能差异显著,其数值分别为2023.86kJ和601.48kJ。
Grain growth behavior and kinetics during the solution treatment process(at temperature from 1080℃ to1190℃,dwelling times from 15 min to 240min) of GH4720 Li alloy was investigated.The experimental results show that the γ'-phase pinning the grain boundary is the dominating resistance of grain growth,the dissolution behavior of γ'-phase at the temperature 1160℃ is the reason that brings the prominent variation of grain growth.The grain growth average activation energies of GH4720 Li alloy are remarkably different at two temperature ranges.The numerical values of grain growth average activation energy are 2023.86 kJ and 601.48 kJ.

引文

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