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陈佳语,于秋颖,董建新,张麦仓,姚志浩.GH720Li合金γ''相回溶过程对后续析出的遗传影响[J].稀有金属材料与工程(英文),2017,46(10):2929~2935.[CHEN Jia-yu,YU Qiu-yin,DONG Jian-xin,ZHANG Mai-cang,YAO Zhi-hao.Heredity of γ′ phase during the dissolution process to the precipitating process in GH720Li[J].Rare Metal Materials and Engineering,2017,46(10):2929~2935.]
Heredity of γ′ phase during the dissolution process to the precipitating process in GH720Li
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Received:July 14, 2015  Revised:August 11, 2015
Key words: GH720Li  γ'' phase  TTT curve  CCT curve
Foundation item:国家自然科学基金资助(51371023)
Author NameAffiliationE-mail
CHEN Jia-yu 北京科技大学材料科学与工程学院 chenjiayu975@126.com 
YU Qiu-yin 北京科技大学材料科学与工程学院  
DONG Jian-xin 北京科技大学材料科学与工程学院  
ZHANG Mai-cang 北京科技大学材料科学与工程学院  
YAO Zhi-hao 北京科技大学材料科学与工程学院  
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      The influence of the dissolution process of γ'' phase on the subsequent precipitating process of γ'' phase was investigated and the effect of Al+Ti contents and Ti/Al ratios to γ'' precipitate was also simulated. The precipitation of γ'' phase are influenced by the dissolution of γ'' phase and the diffusion of Al and Ti content. The size of γ'' precipitate decreases with the increase of solution time and temperature. The precipitation of γ'' phase exhibits various sizes, shapes and distributions under the water cooling condition. It can be shown in TTT and CCT curves that the precipitating temperature increases and the precipitating time decreases under various cooling rates with changes in Al+Ti contents. The precipitation of γ'' phase can not inhibited under the water cooling condition and even when the cooling rate is 1000 ℃/min. Meanwhile, no obvious influence is observed on the precipitation process of γ'' phase with the various Ti/Al ratios.