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汪常亮,李峰,陈福文,常辉,周廉.TC4-Fe合金连续升温过程的相变研究[J].稀有金属材料与工程(英文),2019,48(12):3917~3923.[Changliang Wang,Feng Li,Fuwen Chen,Hui Chang and Lian Zhou.Phase transformation of TC4-Fe alloy during continuous heating process[J].Rare Metal Materials and Engineering,2019,48(12):3917~3923.]
Phase transformation of TC4-Fe alloy during continuous heating process
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Received:March 21, 2019  Revised:May 14, 2019
DOI:
Key words: Ti6Al4V-0.55Fe  Continuous heating process  Phase transformation  Microstructure evolution
Foundation item:国家自然科学基金资助(项目号:51401015),国防基础科研计划(JCKY2018414C020)
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Changliang Wang,Feng Li,Fuwen Chen,Hui Chang and Lian Zhou  
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Abstract:
      The dilatometry behavior and microstructure of the α+β→β phase transformation in the Ti6Al4V-0.55Fe alloy were investigated during continuous heating process. Four heating rates (1, 5, 10, 15 K/min) are been applied for the dilatometry behavior research. For the α+β→β phase transformation curve, the S-shaped pattern under the different heating rates indicates that the α+β→β phase transformation is a nucleation-growth-controlled process. The mean phase transition activation energy E was obtained by the Kissinger-Akahira-Sunose (KAS) method equals to 200 kJ/mol. By calculating the corresponding Avrami index n with the increase of the β phase volume under the Kolmogorov-Johnson-Mehl-Avrami (KJMA) model, we can divide the Avrami index n into three stages which including the initial phase transformation stage (0