A metastable transformative Fe39Mn20Co20Cr15Si5Al1 high entropy alloy (Al-HEA) was friction stir butt welded with Al-7050 alloy. Extensive mechanical mixing was evident in the weld nugget wherein sheared HEA particles were dispersed in Al-alloy matrix. Detail investigation of the weld interface showed suppression of intermetallic formation thereby approaching a clean interface. Tensile testing of the weld nugget showed a strength of 400 MPa with ~ 10% ductility whereas corrosion testing showed no sign of extensive pitting at the Al-HEA/Al-7050 weld interface. Therefore, use of high entropy alloy is an effective pathway for obtaining strong dissimilar joints with high strength Al alloys for lightweight applications. © 2020

Saurabh Sanjay Nene

Department of Metallurgical & Materials Engineering

IIT Jodhpur

S. Gupta

C. Morphew

R.S. Mishra

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Journal	Data powered by TypesetMaterialia
Publisher	Data powered by TypesetElsevier B.V.
ISSN	25891529