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王锟,王永欣,胡石,陈铮,程岩峰.B2-FeAl 有序相中成分与温度对占位与反位缺陷的影响: 相场法研究[J].稀有金属材料与工程(英文),2019,48(7):2112~2117.[Kun Wang,Yongxin Wang,Shi Hu,Zheng Chen and Yanfeng Cheng.The Effects of Composition and Temperature on Site Occupancies and Antisite Defects in B2-FeAl Ordered Phase: A Phase Field Study[J].Rare Metal Materials and Engineering,2019,48(7):2112~2117.]
The Effects of Composition and Temperature on Site Occupancies and Antisite Defects in B2-FeAl Ordered Phase: A Phase Field Study
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Received:January 24, 2018  Revised:May 17, 2018
DOI:
Key words: B2-FeAl  site occupancy  antisite defect  temperature and composition  phase field
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
Kun Wang,Yongxin Wang,Shi Hu,Zheng Chen and Yanfeng Cheng  
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Abstract:
      The site occupancies and antisite defects play important role in the physical and mechanical properties of intermetallic compound alloys. In this paper, the effects of Al concentration (cAl) and temperature (T) on the change trend of site occupancies and antisite defects in B2-FeAl, which has attractive properties, are investigated by phase field method. The numerical results show that the increase of cAl or the decrease of T can result in an acceleration of solute atoms segregation in matrix phase, and make site occupancies of Al and Fe as well as antisite Fe/Al reach equilibrium state earlier. Meanwhile, the increase of cAl or the decrease of T can enhance the site occupancies of Fe and Al and reduce the two types of antisite defects. Furthermore, the theoretical results show that the change of cAl and T is not able to change the main type of antisite defect in B2-FeAl ordered phase.