Optimization of milling parameters for the synthesis of nano-structured duplex
and ferritic stainless steel powders by high energy planetary milling, R. Shashanka, D. Chaira,
Matallurgical and Material Engineering Department.
ere, we have studied the effect of process control agent (PCA) such as stearic acid (SA), effect
of ball to powder weight ratio (BPR 6:1and 12:1) and milling speed (64 and 75% critical speed) during
planetary milling of elemental Fe–18Cr–13Ni (duplex) and Fe–17Cr–1Ni (ferritic) powders for 10h in
a dual drive
planetary mill (DDPM). All these milling parameters have great influence in tuning the final
particle morphology, size and phase evolution during milling. It was found that addition
of PCA, a BPR of 12:1 and 75% critical speed is more effective in reducing particle size
and formation of duplex and ferritic stainless steel after 10h milling of elemental powder
compositions than their counterparts. This work is financially supported by CSIR. More in
Powder Technology (2015), Elsevier (doi: 10.1016/j.powtec.2015.03.007).
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