Staff View: Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]

Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]

In this present work, NiTi alloy were produced by metal injection moulding using elemental powders of Ni and Ti. The binder system comprised of palm stearin (PS). Two compositions of NiTi alloy were investigated; 50 at.% Ni, and 50.8 at.% Ni. Injection moulding was carried at 130°C, followed by solv...

Full description

Saved in:

Bibliographic Details
Main Authors:	Maso’od, Mashitah, Ismail, Muhammad Hussain, Razali, Rosliza, Subuki, Istiqamah
Format:	Article
Language:	English
Published:	Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM) 2018
Subjects:	Metals TJ Mechanical engineering and machinery
Online Access:	http://ir.uitm.edu.my/id/eprint/40957/1/40957.pdf http://ir.uitm.edu.my/id/eprint/40957/
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my.uitm.ir.40957
record_format	eprints
spelling	my.uitm.ir.409572021-01-26T02:56:40Z http://ir.uitm.edu.my/id/eprint/40957/ Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.] Maso’od, Mashitah Ismail, Muhammad Hussain Razali, Rosliza Subuki, Istiqamah Metals TJ Mechanical engineering and machinery In this present work, NiTi alloy were produced by metal injection moulding using elemental powders of Ni and Ti. The binder system comprised of palm stearin (PS). Two compositions of NiTi alloy were investigated; 50 at.% Ni, and 50.8 at.% Ni. Injection moulding was carried at 130°C, followed by solvent extraction using heptane as the solution. In a high vacuum furnace, the samples were thermally debound at 500oC and subsequently sintered at three different temperatures; 1050, 1100 and 1150 °C. All sintered samples were charateried by XRD and SEM for phase and microstructural analysis, respectively. Reversible phase transformation temperatures (PTTs) of austenite to martensite was determined by DSC analysis. The results showed that B2 (Austenite) and B19’ were the main phases identified while minor phases consist of minimal fractions of Ti-rich phases (NiTi2/Ni2Ti4Ox) and Ni- rich phases (Ni3Ti and Ni4Ti3). As composition of Ni content increased, the reversible martensite to austenite PTTs became wider while enthalpy for phase transition decreased. The FESEM microstuctural analysis defined the formation different phases of atomic mass from dissimilar grey scale contrast. Brightest region assumed to be Ni4Ti3 formation and vice versa indicated Ti-rich phases (NiTi2/Ni2Ti4Ox) Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM) 2018 Article PeerReviewed text en http://ir.uitm.edu.my/id/eprint/40957/1/40957.pdf Maso’od, Mashitah and Ismail, Muhammad Hussain and Razali, Rosliza and Subuki, Istiqamah (2018) Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]. Journal of Mechanical Engineering (JMechE), SI 5 (6). pp. 115-126. ISSN 18235514
institution	Universiti Teknologi Mara
building	Tun Abdul Razak Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Mara
content_source	UiTM Institutional Repository
url_provider	http://ir.uitm.edu.my/
language	English
topic	Metals TJ Mechanical engineering and machinery
spellingShingle	Metals TJ Mechanical engineering and machinery Maso’od, Mashitah Ismail, Muhammad Hussain Razali, Rosliza Subuki, Istiqamah Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]
description	In this present work, NiTi alloy were produced by metal injection moulding using elemental powders of Ni and Ti. The binder system comprised of palm stearin (PS). Two compositions of NiTi alloy were investigated; 50 at.% Ni, and 50.8 at.% Ni. Injection moulding was carried at 130°C, followed by solvent extraction using heptane as the solution. In a high vacuum furnace, the samples were thermally debound at 500oC and subsequently sintered at three different temperatures; 1050, 1100 and 1150 °C. All sintered samples were charateried by XRD and SEM for phase and microstructural analysis, respectively. Reversible phase transformation temperatures (PTTs) of austenite to martensite was determined by DSC analysis. The results showed that B2 (Austenite) and B19’ were the main phases identified while minor phases consist of minimal fractions of Ti-rich phases (NiTi2/Ni2Ti4Ox) and Ni- rich phases (Ni3Ti and Ni4Ti3). As composition of Ni content increased, the reversible martensite to austenite PTTs became wider while enthalpy for phase transition decreased. The FESEM microstuctural analysis defined the formation different phases of atomic mass from dissimilar grey scale contrast. Brightest region assumed to be Ni4Ti3 formation and vice versa indicated Ti-rich phases (NiTi2/Ni2Ti4Ox)
format	Article
author	Maso’od, Mashitah Ismail, Muhammad Hussain Razali, Rosliza Subuki, Istiqamah
author_facet	Maso’od, Mashitah Ismail, Muhammad Hussain Razali, Rosliza Subuki, Istiqamah
author_sort	Maso’od, Mashitah
title	Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]
title_short	Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]
title_full	Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]
title_fullStr	Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]
title_full_unstemmed	Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]
title_sort	effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous niti alloy produced by metal injection moulding / mashitah maso’od ... [et al.]
publisher	Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM)
publishDate	2018
url	http://ir.uitm.edu.my/id/eprint/40957/1/40957.pdf http://ir.uitm.edu.my/id/eprint/40957/
_version_	1690374298287472640
score	13.211869

Effect of sintering temperatures on microstructural changes and phase transformation of nearly equiatomic microporous NiTi Alloy produced by metal injection moulding / Mashitah Maso’od ... [et al.]

Similar Items