Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 27    No. 7    July 2017

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Microstructure evolution and mechanical properties of spark plasma sintered W-Ni-Mn alloy
Yan-lin PAN, Lei DING, Dao-ping XIANG

State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China

Abstract:Tungsten heavy alloys (90W-6Ni-4Mn) were prepared through spark plasma sintering (SPS) using micron-sized W, Ni, and Mn powders without ball milling as raw materials. The effects of sintering temperature on the microstructure and mechanical properties of the 90W-6Ni-4Mn alloys were investigated. SPS technology was used to prepare 90W-6Ni-4Mn alloys with relatively high density and excellent comprehensive performance at 1150-1250 °C for 3 min. The 90W-6Ni-4Mn alloys consisted of the W phase and the γ-(Ni, Mn, and W) binding phase, and the average grain size was less than 10 μm. The Rockwell hardness and bending strength of alloys first increased and then decreased with increasing sintering temperature. The best comprehensive performance was obtained at 1200 °C, its hardness and bending strength were HRA 68.7 and 1162.72 MPa, respectively.


Key words: 90W-6Ni-4Mn alloy; spark plasma sintering; microstructure; Rockwell hardness; bending strength

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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