Accepted Manuscript Nanostructure development in refractory metals: ECAP processing of Niobium and Tantalum using indirect-extrusion technique Babak Omranpour, Lembit Kommel, Valdek Mikli, Edgar Garcia, Jacques Huot PII: S0263-4368(18)30456-6 DOI: doi:10.1016/j.ijrmhm.2018.10.018 Reference: RMHM 4817 To appear in: International Journal of Refractory Metals and Hard Materials Received date: 14 July 2018 Revised date: 21 October 2018 Accepted date: 27 October 2018 Please cite this article as: Babak Omranpour, Lembit Kommel, Valdek Mikli, Edgar Garcia, Jacques Huot , Nanostructure development in refractory metals: ECAP processing of Niobium and Tantalum using indirect-extrusion technique. Rmhm (2018), doi:10.1016/ j.ijrmhm.2018.10.018 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.