Vickers micro-hardness variation during change in concentration of constituent elements in Ni50–xFexMn30Sn20–yIny, Heusler alloysSandeep Nambiar S., Murthy B.R.N., Sathyashankara S., Prasanna A.A. and Arout Chelvane J.Manufacturing Rev., 9 (2022) 4DOI: https://doi.org/10.1051/mfreview/2022002