Accepted Manuscript Thermal stability and grain boundary strengthening in ultrafine- grained CoCrFeNi high entropy alloy composite Praveen Sathiyamoorthi, Joysurya Basu, Sanjay Kashyap, K.G. Pradeep, Ravi Sankar Kottada PII: S0264-1275(17)30811-0 DOI: doi: 10.1016/j.matdes.2017.08.053 Reference: JMADE 3312 To appear in: Materials & Design Received date: 10 May 2017 Revised date: 23 August 2017 Accepted date: 26 August 2017 Please cite this article as: Praveen Sathiyamoorthi, Joysurya Basu, Sanjay Kashyap, K.G. Pradeep, Ravi Sankar Kottada , Thermal stability and grain boundary strengthening in ultrafine-grained CoCrFeNi high entropy alloy composite, Materials & Design (2017), doi: 10.1016/j.matdes.2017.08.053 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.