期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2017.05.075
关键词
High entropy alloys; PLC effect; Dynamic strain aging
类别
资金
- National Nature Science Foundation of China [51271151, 51571161]
- Natural Science Basic Research Plan in Shaanxi Province of China [2016JQ5003]
- Program of Introducing Talents of Discipline to Universities [B08040]
Serrated flow in Al0.5CoCrFeNi high entropy alloy (HEA) was studied at the temperature range of 200-500 degrees C with strain rates from 10(-3) s(-1) to 10(-4) s(-1). Results showed that serration type would transform from type A to type A + B, and eventually evolved into type B+C with the increasing temperature and decreasing strain rate. The dynamic strain aging was the reason for the Portevin-Le Chatelier (PLC) effect, and Al played a crucial role in the interaction between solute atoms and dislocation. The characteristics of serration are revealed through statistics firstly in HEAs.
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