Please use this identifier to cite or link to this item:
Title: Effect of Ni addition on microstructure, mechanical and high temperature behavior of mechanically alloyed W-Nb
Authors: Meher, P
Kiran, C
Patra, Anshuman
Saxena, R
Karak, S. K
Keywords: W based alloy
Mechanical alloying Strength
Issue Date: Dec-2017
Citation: International Conference on Nanotechnology: Ideas, Innovations and Initiatives-2017 (ICN : 3I-2017), IIT Roorkee, India, 6 - 8 December, 2017
Abstract: The present investigation comprises the fabrication of tungsten (W) based alloys with nominal composition of W70Ni20Nb10 (alloy A), W75Ni15Nb10, (alloy B) (all in wt.%) by mechanical alloying (MA) in a planetary ball mill followed by sintering at 1500°C for 2 h in Ar atmosphere. The milled powders and the consolidated products have been investigated by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Minimum crystallite size and maximum lattice strain of 45 nm and 0.42% respectively is achieved in alloy B. Maximum sinterability, hardness of 90.5%, 4.58 GPa (at 50g) respectively is achieved in alloy B due to finer crystallite size, higher surface energy and shorter atomic diffusion distance whereas maximum compressive strength of 2.14 GPa and minimum wear rate is achieved in alloy A owing to the formation of higher fraction of hard NbNi intermetallic phase. High temperature oxidation study at 900°C for 10 h reveals that lower oxidation rate is achieved in alloy A owing to lesser weight fraction of W and higher propensity of protective NiWO4 scale formation.
Description: Copyright of this document belongs to proceedings publisher.
Appears in Collections:Conference Papers

Files in This Item:
File Description SizeFormat 
2017_ICN_APatra_Effect of Ni.pdfPPT Presentation2.57 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.