Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction

Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction

Two alloys, Ti-47Al-2Nb-2Cr (MJ12) and Ti-47Al-2Nb-2Mn + 0.8TiB2(MJ47), were nitrided in purified ammonia for 3.6 × 103-3.6 × 104s (1-10 h) at a temperature range of 800-1,000 °C. The nitridation process can successfully improve alloy hardness which increased with an increase of the nitridation temp...

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Main Authors: Kittichai Sopunna, Titipun Thongtem, Michael McNallan, Somchai Thongtem
Format: Journal
Published: 2018
Subjects:
Materials Science
Physics and Astronomy
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33747088193&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/61745
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-617452018-09-11T09:02:08Z Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction Kittichai Sopunna Titipun Thongtem Michael McNallan Somchai Thongtem Materials Science Physics and Astronomy Two alloys, Ti-47Al-2Nb-2Cr (MJ12) and Ti-47Al-2Nb-2Mn + 0.8TiB2(MJ47), were nitrided in purified ammonia for 3.6 × 103-3.6 × 104s (1-10 h) at a temperature range of 800-1,000 °C. The nitridation process can successfully improve alloy hardness which increased with an increase of the nitridation temperature and time. Hardness values of MJ12 and MJ47 with 1,000 °C nitridation for 3.6 × 104s were the highest at 700.5 ± 9.0 and 694.7 ± 21.8 kg mm-2, respectively. The wear rate and friction coefficient were significantly reduced by the nitridation process. Wear resistance of both alloys increased by two orders of magnitude after nitridation compared to the corresponding alloys without nitridation. In addition, the alloys were analyzed using XRD, SEM, EDX and an optical microscope. 2018-09-11T08:58:26Z 2018-09-11T08:58:26Z 2006-07-01 Journal 15734803 00222461 2-s2.0-33747088193 10.1007/s10853-006-0030-y https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33747088193&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/61745
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Materials Science
Physics and Astronomy
spellingShingle Materials Science
Physics and Astronomy
Kittichai Sopunna
Titipun Thongtem
Michael McNallan
Somchai Thongtem
Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction
description Two alloys, Ti-47Al-2Nb-2Cr (MJ12) and Ti-47Al-2Nb-2Mn + 0.8TiB2(MJ47), were nitrided in purified ammonia for 3.6 × 103-3.6 × 104s (1-10 h) at a temperature range of 800-1,000 °C. The nitridation process can successfully improve alloy hardness which increased with an increase of the nitridation temperature and time. Hardness values of MJ12 and MJ47 with 1,000 °C nitridation for 3.6 × 104s were the highest at 700.5 ± 9.0 and 694.7 ± 21.8 kg mm-2, respectively. The wear rate and friction coefficient were significantly reduced by the nitridation process. Wear resistance of both alloys increased by two orders of magnitude after nitridation compared to the corresponding alloys without nitridation. In addition, the alloys were analyzed using XRD, SEM, EDX and an optical microscope.
format Journal
author Kittichai Sopunna
Titipun Thongtem
Michael McNallan
Somchai Thongtem
author_facet Kittichai Sopunna
Titipun Thongtem
Michael McNallan
Somchai Thongtem
author_sort Kittichai Sopunna
title Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction
title_short Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction
title_full Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction
title_fullStr Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction
title_full_unstemmed Formation of titanium nitride on γ-TiAl alloys by direct metal-gas reaction
title_sort formation of titanium nitride on γ-tial alloys by direct metal-gas reaction
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33747088193&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/61745
_version_ 1681425677831634944

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