NiAl shape memory alloy by powder metallurgy method

C. H. Man; C. Y. Chung

NiAl shape memory alloy by powder metallurgy method

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

Mechanical alloying in high-energy ball-milling machine was used to fabricate the NiAl shape memory alloy. The effect of milling time on the mechanical properties was investigated. The microstructures and phase transformations of NiAl were studied by scanning electron microscope (SEM), x-ray diffraction (XRD), differential scanning calorimetry (DSC) and dynamic thermal analysis (DTA). Lamella micro-structures was found in the SEM examination and they were confirmed to have the martensite structure by XRD analysis. Results from DSC thermal analysis revealed that the sintered-compact exhibited thermoelastic transformation. Besides, the martensitic transformation was found to have suppressed by the presence of Ni₅Al₃ precipitates in some of the ball-milled specimens.

Original language	English
Pages (from-to)	497-500
Journal	Materials Science Forum
Volume	327
Publication status	Published - 2000
Event	Proceedings of the 1999 International Symposium and Exhibition on Shape Memory Materials (SMM'99) - Kanazawa, Jpn Duration: 19 May 1999 → 21 May 1999

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title = "NiAl shape memory alloy by powder metallurgy method",

abstract = "Mechanical alloying in high-energy ball-milling machine was used to fabricate the NiAl shape memory alloy. The effect of milling time on the mechanical properties was investigated. The microstructures and phase transformations of NiAl were studied by scanning electron microscope (SEM), x-ray diffraction (XRD), differential scanning calorimetry (DSC) and dynamic thermal analysis (DTA). Lamella micro-structures was found in the SEM examination and they were confirmed to have the martensite structure by XRD analysis. Results from DSC thermal analysis revealed that the sintered-compact exhibited thermoelastic transformation. Besides, the martensitic transformation was found to have suppressed by the presence of Ni5Al3 precipitates in some of the ball-milled specimens.",

author = "Man, {C. H.} and Chung, {C. Y.}",

year = "2000",

language = "English",

volume = "327",

pages = "497--500",

journal = "Materials Science Forum",

issn = "0255-5476",

publisher = "Trans Tech Publications Ltd.",

note = "Proceedings of the 1999 International Symposium and Exhibition on Shape Memory Materials (SMM'99) ; Conference date: 19-05-1999 Through 21-05-1999",

}

TY - JOUR

T1 - NiAl shape memory alloy by powder metallurgy method

AU - Man, C. H.

AU - Chung, C. Y.

PY - 2000

Y1 - 2000

N2 - Mechanical alloying in high-energy ball-milling machine was used to fabricate the NiAl shape memory alloy. The effect of milling time on the mechanical properties was investigated. The microstructures and phase transformations of NiAl were studied by scanning electron microscope (SEM), x-ray diffraction (XRD), differential scanning calorimetry (DSC) and dynamic thermal analysis (DTA). Lamella micro-structures was found in the SEM examination and they were confirmed to have the martensite structure by XRD analysis. Results from DSC thermal analysis revealed that the sintered-compact exhibited thermoelastic transformation. Besides, the martensitic transformation was found to have suppressed by the presence of Ni5Al3 precipitates in some of the ball-milled specimens.

AB - Mechanical alloying in high-energy ball-milling machine was used to fabricate the NiAl shape memory alloy. The effect of milling time on the mechanical properties was investigated. The microstructures and phase transformations of NiAl were studied by scanning electron microscope (SEM), x-ray diffraction (XRD), differential scanning calorimetry (DSC) and dynamic thermal analysis (DTA). Lamella micro-structures was found in the SEM examination and they were confirmed to have the martensite structure by XRD analysis. Results from DSC thermal analysis revealed that the sintered-compact exhibited thermoelastic transformation. Besides, the martensitic transformation was found to have suppressed by the presence of Ni5Al3 precipitates in some of the ball-milled specimens.

UR - http://www.scopus.com/inward/record.url?scp=0033896353&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0033896353&origin=recordpage

M3 - RGC 21 - Publication in refereed journal

SN - 0255-5476

VL - 327

SP - 497

EP - 500

JO - Materials Science Forum

JF - Materials Science Forum

T2 - Proceedings of the 1999 International Symposium and Exhibition on Shape Memory Materials (SMM'99)

Y2 - 19 May 1999 through 21 May 1999

ER -

NiAl shape memory alloy by powder metallurgy method

Abstract

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