Surface modification of the γ-TiAl alloys by the nitridation

The nitridation of Ti-47%Al-2%Nb-2%Cr (MJ12) and Ti-47%Al-2%Nb-2%Mn-0.8% TiB2 (MJ47) was studied using purified NH3. The flow rate of the gas was kept constant at 10 mls-1. The nitridation process was done at temperatures of 800, 900 and 1000 °C for 36.0 ks (10 h). The alloys were then characterized...

Full description

Saved in:
Bibliographic Details
Main Authors: Sopunna K., Thongtem T., McNallan M., Thongtem S.
Other Authors: Chab V.Prince K.Maca F.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-4544357339&partnerID=40&md5=77dac4ca59dc7f38a1a6ef78c9b758bd
http://cmuir.cmu.ac.th/handle/6653943832/6711
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Chiang Mai University
Language: English
id th-cmuir.6653943832-6711
record_format dspace
spelling th-cmuir.6653943832-67112014-08-30T03:51:08Z Surface modification of the γ-TiAl alloys by the nitridation Sopunna K. Thongtem T. McNallan M. Thongtem S. Chab V.Prince K.Maca F. The nitridation of Ti-47%Al-2%Nb-2%Cr (MJ12) and Ti-47%Al-2%Nb-2%Mn-0.8% TiB2 (MJ47) was studied using purified NH3. The flow rate of the gas was kept constant at 10 mls-1. The nitridation process was done at temperatures of 800, 900 and 1000 °C for 36.0 ks (10 h). The alloys were then characterized using a scanning electron microscope (SEM), an X-ray diffractometer (XRD), a tribometer and a microhardness tester. The Knoop hardness (HK) values of the nitrided alloys were increased with an increase in the nitridation temperature and time. The HK values of MJ12 and MJ47 with 1000 °C nitridation for 36.0 ks were 2.1 and 1.5 times that of the non-nitrided alloys, respectively. The wear rates of MJ12 and MJ47 with 800-1000 °C nitridation were reduced by one or two orders of magnitude in comparison to the non-nitrided alloys. Hardness and wear resistance of the alloys were successfully improved by the nitridation which was in agreement with the formation of the TiN on the alloy surfaces. The SEM micrographs of the nitrided alloys showed a rough surface which could effect the wear resistance. © 2004 Elsevier B.V. All rights reserved. 2014-08-30T03:51:08Z 2014-08-30T03:51:08Z 2004 Article 00396028 10.1016/j.susc.2004.06.113 63493 SUSCA http://www.scopus.com/inward/record.url?eid=2-s2.0-4544357339&partnerID=40&md5=77dac4ca59dc7f38a1a6ef78c9b758bd http://cmuir.cmu.ac.th/handle/6653943832/6711 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description The nitridation of Ti-47%Al-2%Nb-2%Cr (MJ12) and Ti-47%Al-2%Nb-2%Mn-0.8% TiB2 (MJ47) was studied using purified NH3. The flow rate of the gas was kept constant at 10 mls-1. The nitridation process was done at temperatures of 800, 900 and 1000 °C for 36.0 ks (10 h). The alloys were then characterized using a scanning electron microscope (SEM), an X-ray diffractometer (XRD), a tribometer and a microhardness tester. The Knoop hardness (HK) values of the nitrided alloys were increased with an increase in the nitridation temperature and time. The HK values of MJ12 and MJ47 with 1000 °C nitridation for 36.0 ks were 2.1 and 1.5 times that of the non-nitrided alloys, respectively. The wear rates of MJ12 and MJ47 with 800-1000 °C nitridation were reduced by one or two orders of magnitude in comparison to the non-nitrided alloys. Hardness and wear resistance of the alloys were successfully improved by the nitridation which was in agreement with the formation of the TiN on the alloy surfaces. The SEM micrographs of the nitrided alloys showed a rough surface which could effect the wear resistance. © 2004 Elsevier B.V. All rights reserved.
author2 Chab V.Prince K.Maca F.
author_facet Chab V.Prince K.Maca F.
Sopunna K.
Thongtem T.
McNallan M.
Thongtem S.
format Article
author Sopunna K.
Thongtem T.
McNallan M.
Thongtem S.
spellingShingle Sopunna K.
Thongtem T.
McNallan M.
Thongtem S.
Surface modification of the γ-TiAl alloys by the nitridation
author_sort Sopunna K.
title Surface modification of the γ-TiAl alloys by the nitridation
title_short Surface modification of the γ-TiAl alloys by the nitridation
title_full Surface modification of the γ-TiAl alloys by the nitridation
title_fullStr Surface modification of the γ-TiAl alloys by the nitridation
title_full_unstemmed Surface modification of the γ-TiAl alloys by the nitridation
title_sort surface modification of the γ-tial alloys by the nitridation
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-4544357339&partnerID=40&md5=77dac4ca59dc7f38a1a6ef78c9b758bd
http://cmuir.cmu.ac.th/handle/6653943832/6711
_version_ 1681420664895963136