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博士生陈良斌关于高熵合金韧脆转变的论文被 Materials Letters 接收录用


2018-10-26

 

 

The ductile-brittle transition of carbon alloyed Fe40Mn40Co10Cr10 high entropy alloys

 

L.B. Chena, R. Weib, K. Tanga, J. Zhanga, F. Jianga,*, J. Suna

 

aState Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiao tong University, Xi'an 710049, China

 

bSchool of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

 

*Corresponding author: jiangfeng@mail.xjtu.edu.cn (F. Jiang)

 

Abstract The mechanical behavior of (Fe40Mn40Co10Cr10)100-xCx (x = 0, 2.2, 3.3 at%) high entropy alloys (HEA) at various temperatures (298K, 159K and 77K) was investigated. For Fe40Mn40Co10Cr10 HEA, the jointly activated twinning and martensitic phase transformation concurrent increased the strength and ductility at 77K. In contrast, twinning and phase transformation gradually vanished as temperature decreased for carbon alloyed HEAs, resulted in ductile-brittle transition. Our findings indicated that the additional interstitial carbon atoms increased the f.c.c. phase stability, and inhibited the deformability of Fe40Mn40Co10Cr10 HEA at low temperature.

 

Keywords: Metals and alloys; Deformation and fracture; High entropy alloys; Phase transformation; Microstructure; Ductile-brittle transition.

 

 

 祝贺陈良斌学!并将按照规定奖励 1500元整。