期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 26, 期 8, 页码 3750-3755出版社
SPRINGER
DOI: 10.1007/s11665-017-2831-3
关键词
boride precipitation; high-entropy alloy; solid solution strengthening; yttrium addition
资金
- National Natural Science Foundation of China (NSFC) [51271001]
- Joint Fund of Iron and Steel Research by NSFC [U1560105]
- University Natural Science Research Project of Anhui Province of China [KJ2014A029]
- Tribology Science Fund of State Key Laboratory of Tribology [SKLTKF14B02]
A series of multi-principal-element (MPE) alloys have been prepared by adding Ni, Mn, Al, Cu and Y into the reference CoCrFe-B alloy. The microstructure and mechanical properties of these MPE alloys have been investigated thoroughly. It is found that the addition of the elements can inhibit boride precipitation in the designed alloys and the solid solution strengthening effect induced by interstitial boron atoms is more significant than that by boride precipitation. The MPE alloys with the fcc phase as the main solid solution phase have a higher boron solubility and hence less boride precipitation, than those with the bcc phase as the main solid solution phase. The addition of yttrium can improve the boron solubility, decrease boride precipitation, control the boride morphology and, importantly, simultaneously improve the compressive strength and ductility of boron-containing MPE alloys.
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