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Title: Experimental investigation of grain boundaries misorientations and nano twinning induced strengthening on addition of silicon carbide in pulse electrodeposited nickel tungsten composite coating

Abstract

Nanoindentation was performed on silicon carbide (SiC) reinforced pulse electrodeposited nickel-tungsten (Ni-W) composite coating. Addition of 5 vol.% of SiC in Ni-W coating increased the hardness from 10.31 ± 0.65 GPa to 14.32 ± 0.63 GPa and elastic modulus from 119.74 ± 3.15 GPa to 139.26 ± 2.09 GPa. Increased hardness and elastic modulus directly translates to the improved strengthening in the coating. An experimental investigation of strengthening mechanism was carried out in Ni-W-5 vol.% SiC alloy. Two simultaneous phenomena viz. grain refinement and increased internal strain was observed, which increased the dislocation density from 5.51 × 10{sup 18} m{sup −2} to 1.346 × 10{sup 19} m{sup −2} on reinforcement of 5 vol.% of SiC in Ni-W coating. Increased dislocation density promoted the formation of grain boundary misorientations and nano twinning. Low angle grain boundary, high angle grain boundary and nano twinning were identified using high resolution transmission electron microscope (HR-TEM) image and their role in strengthening mechanism was discussed in details. - Highlights: • SiC reinforced pulse electrodeposition Ni-W coating was deposited on steel. • Nanoindentation showed the increased mechanical properties on addition of SiC. • Grain refinement and increased internal strain was observed in Ni-W-SiC coating. • Dislocationmore » density increased on reinforcement of SiC in Ni-W coating. • Increased dislocation density triggered grain boundary misorientation and twinning.« less

Authors:
 [1]; ;  [2];  [1]
  1. Materials Science and Engineering, Indian Institute of Technology Patna, Bihta-Kanpa Road, Amhara P.O., Bihta, Patna, Bihar 801103 (India)
  2. International Advanced Research Centre for Powder Metallurgy & New Materials (ARCI) Hyderabad, Balapur P.O., Hyderabad, Andhra Pradesh 500005 (India)
Publication Date:
OSTI Identifier:
22587152
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 116; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; DEPOSITS; DISLOCATIONS; ELECTRODEPOSITION; GRAIN BOUNDARIES; GRAIN REFINEMENT; HARDNESS; NANOTECHNOLOGY; NICKEL ALLOYS; PRESSURE RANGE GIGA PA; SILICON CARBIDES; STEELS; STRAINS; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Rahman, O.S. Asiq, Wasekar, Nitin P., Sundararajan, G., and Keshri, Anup Kumar, E-mail: anup@iitp.ac.in. Experimental investigation of grain boundaries misorientations and nano twinning induced strengthening on addition of silicon carbide in pulse electrodeposited nickel tungsten composite coating. United States: N. p., 2016. Web. doi:10.1016/J.MATCHAR.2016.04.002.
Rahman, O.S. Asiq, Wasekar, Nitin P., Sundararajan, G., & Keshri, Anup Kumar, E-mail: anup@iitp.ac.in. Experimental investigation of grain boundaries misorientations and nano twinning induced strengthening on addition of silicon carbide in pulse electrodeposited nickel tungsten composite coating. United States. doi:10.1016/J.MATCHAR.2016.04.002.
Rahman, O.S. Asiq, Wasekar, Nitin P., Sundararajan, G., and Keshri, Anup Kumar, E-mail: anup@iitp.ac.in. Wed . "Experimental investigation of grain boundaries misorientations and nano twinning induced strengthening on addition of silicon carbide in pulse electrodeposited nickel tungsten composite coating". United States. doi:10.1016/J.MATCHAR.2016.04.002.
@article{osti_22587152,
title = {Experimental investigation of grain boundaries misorientations and nano twinning induced strengthening on addition of silicon carbide in pulse electrodeposited nickel tungsten composite coating},
author = {Rahman, O.S. Asiq and Wasekar, Nitin P. and Sundararajan, G. and Keshri, Anup Kumar, E-mail: anup@iitp.ac.in},
abstractNote = {Nanoindentation was performed on silicon carbide (SiC) reinforced pulse electrodeposited nickel-tungsten (Ni-W) composite coating. Addition of 5 vol.% of SiC in Ni-W coating increased the hardness from 10.31 ± 0.65 GPa to 14.32 ± 0.63 GPa and elastic modulus from 119.74 ± 3.15 GPa to 139.26 ± 2.09 GPa. Increased hardness and elastic modulus directly translates to the improved strengthening in the coating. An experimental investigation of strengthening mechanism was carried out in Ni-W-5 vol.% SiC alloy. Two simultaneous phenomena viz. grain refinement and increased internal strain was observed, which increased the dislocation density from 5.51 × 10{sup 18} m{sup −2} to 1.346 × 10{sup 19} m{sup −2} on reinforcement of 5 vol.% of SiC in Ni-W coating. Increased dislocation density promoted the formation of grain boundary misorientations and nano twinning. Low angle grain boundary, high angle grain boundary and nano twinning were identified using high resolution transmission electron microscope (HR-TEM) image and their role in strengthening mechanism was discussed in details. - Highlights: • SiC reinforced pulse electrodeposition Ni-W coating was deposited on steel. • Nanoindentation showed the increased mechanical properties on addition of SiC. • Grain refinement and increased internal strain was observed in Ni-W-SiC coating. • Dislocation density increased on reinforcement of SiC in Ni-W coating. • Increased dislocation density triggered grain boundary misorientation and twinning.},
doi = {10.1016/J.MATCHAR.2016.04.002},
journal = {Materials Characterization},
number = ,
volume = 116,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}