Evading intermediate temperature embrittlement of FeCoCrNiMn high entropy alloy via N-doping
High entropy alloys (HEAs) exhibit high strength and excellent ductility at both room and low temperatures. The loss of ductility with increasing the tensile temperature above room temperature has been widely observed in single phase face-centered cubic structured HEAs. In this work, a N and Si dope...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424023196 |
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| author | Ji Gu Zhipeng Sun Zhonglun Zhang Caiyu Guo Hongyao Yu Min Song |
| author_facet | Ji Gu Zhipeng Sun Zhonglun Zhang Caiyu Guo Hongyao Yu Min Song |
| author_sort | Ji Gu |
| collection | DOAJ |
| description | High entropy alloys (HEAs) exhibit high strength and excellent ductility at both room and low temperatures. The loss of ductility with increasing the tensile temperature above room temperature has been widely observed in single phase face-centered cubic structured HEAs. In this work, a N and Si doped FeCoCrNiMn-(N,Si) HEA with preexisting nano-sized Cr2N particles was fabricated by laser powder bed fusion (LPBF) and subsequent cold-rolling and annealing treatment. Tensile testing was conducted on the alloy at 298 K, 573 K, 773 K, 873 K, and 973 K, respectively. It has been shown that the FeCoCrNiMn-(N,Si) alloy with preexisting Cr2N phase exhibits a steady ductility with increasing the tensile temperature. The intermediate temperature embrittlement is evaded in the FeCoCrNiMn-(N,Si) alloy via N-doping. The widely reported loss of ductility with increasing deformation temperature was avoided in present FeCoCrNiMn-(N,Si) HEA by shifting fast segregation of element Cr from GBs into preexisting Cr2N phase due to the high affinity between N and Cr elements, leading to the increases in the content and size of Cr2N particles after high temperature deformation. |
| format | Article |
| id | doaj-art-1e84799def664a68aed6fd64aa3ea310 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-1e84799def664a68aed6fd64aa3ea3102024-12-26T08:54:27ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013334623469Evading intermediate temperature embrittlement of FeCoCrNiMn high entropy alloy via N-dopingJi Gu0Zhipeng Sun1Zhonglun Zhang2Caiyu Guo3Hongyao Yu4Min Song5State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; CNBM Zhongyan Technology Co., Ltd., Beijing, 100024, ChinaHigh Temperature Materials Research Institute, Central Iron and Steel Research Institute, Beijing, 100081, ChinaHigh Temperature Materials Research Institute, Central Iron and Steel Research Institute, Beijing, 100081, China; Corresponding author.State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; Corresponding author.High entropy alloys (HEAs) exhibit high strength and excellent ductility at both room and low temperatures. The loss of ductility with increasing the tensile temperature above room temperature has been widely observed in single phase face-centered cubic structured HEAs. In this work, a N and Si doped FeCoCrNiMn-(N,Si) HEA with preexisting nano-sized Cr2N particles was fabricated by laser powder bed fusion (LPBF) and subsequent cold-rolling and annealing treatment. Tensile testing was conducted on the alloy at 298 K, 573 K, 773 K, 873 K, and 973 K, respectively. It has been shown that the FeCoCrNiMn-(N,Si) alloy with preexisting Cr2N phase exhibits a steady ductility with increasing the tensile temperature. The intermediate temperature embrittlement is evaded in the FeCoCrNiMn-(N,Si) alloy via N-doping. The widely reported loss of ductility with increasing deformation temperature was avoided in present FeCoCrNiMn-(N,Si) HEA by shifting fast segregation of element Cr from GBs into preexisting Cr2N phase due to the high affinity between N and Cr elements, leading to the increases in the content and size of Cr2N particles after high temperature deformation.http://www.sciencedirect.com/science/article/pii/S2238785424023196High entropy alloysDuctilityStrengthHigh temperature |
| spellingShingle | Ji Gu Zhipeng Sun Zhonglun Zhang Caiyu Guo Hongyao Yu Min Song Evading intermediate temperature embrittlement of FeCoCrNiMn high entropy alloy via N-doping Journal of Materials Research and Technology High entropy alloys Ductility Strength High temperature |
| title | Evading intermediate temperature embrittlement of FeCoCrNiMn high entropy alloy via N-doping |
| title_full | Evading intermediate temperature embrittlement of FeCoCrNiMn high entropy alloy via N-doping |
| title_fullStr | Evading intermediate temperature embrittlement of FeCoCrNiMn high entropy alloy via N-doping |
| title_full_unstemmed | Evading intermediate temperature embrittlement of FeCoCrNiMn high entropy alloy via N-doping |
| title_short | Evading intermediate temperature embrittlement of FeCoCrNiMn high entropy alloy via N-doping |
| title_sort | evading intermediate temperature embrittlement of fecocrnimn high entropy alloy via n doping |
| topic | High entropy alloys Ductility Strength High temperature |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424023196 |
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