Investigation of phase transformation and mechanical properties of silicon addition on AlCrFeMnNi high entropy alloys

被引:0
作者
Chandrakar, Rituraj [1 ]
Chandraker, Saurabh [1 ]
Kumar, Anil [2 ]
Jaiswal, Ankur [3 ]
机构
[1] Natl Inst Technol Karnataka NITK, Dept Mech Engn, Surathkal, India
[2] Bhilai Inst Technol, Dept Mech Engn, Durg, Chhattisgarh, India
[3] Manipal Acad Higher Educ MAHE, Manipal Inst Technol, Dept Mechatron, Manipal 576104, Karnataka, India
关键词
high entropy alloys; grain boundary strengthening; crystal structure; compressive strength; wear resistance; corrosion; CORROSION BEHAVIOR; FATIGUE BEHAVIOR; SI ADDITION; NI; MICROSTRUCTURE; AL; CR; EVOLUTION; MN; PERFORMANCE;
D O I
10.1088/2053-1591/ad8e32
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper examines the impact of silicon in the AlCrFeMnNi high-entropy alloy system, focusing on both its microstructural and mechanical properties. Alloys with varying silicon content ( x = 0, 0.3, 0.6, 0.9 atomic ratio) were synthesized using vacuum arc melting. The phase formation of these high- entropy alloys was analyzed using x-ray diffraction to comprehend the alloying process behaviour. The fi ndings revealed that the solidification of the AlCrFeMnNi alloy occurred in dendritically, with dendrite cores containing Cr, Fe, and Ni, while interdendritic regions were enriched in Al and Ni after adding Silicon. Increasing the silicon content from 0 to 0.9 led to significant improvements in microhardness and wear resistance. This improvement is attributed to the reinforcement of grain boundaries provided by silicon. The formation of an Al and Ni rich B2 phase is crucial in resisting dislocation motion and preventing further deformation. Additionally, the addition of silicon led to improved corrosion resistance, as demonstrated by potentiodynamic polarization measurements. However, a trade-off was observed between compressive strength and ductility: compressive strength increased with higher silicon concentrations, but at the expense of ductility.
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页数:13
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