The Influence of Alloying Constituent Fe on Mechanical Properties of NiTi Based Shape Memory Alloys

Title

The Influence of Alloying Constituent Fe on Mechanical Properties of NiTi Based Shape Memory Alloys

Creator

Naresh H.; Bharath H.S.; Prashantha S.

Description

The influences of Fe-addition on phase transformation behavior, mechanical properties and microstructure of Ti50Ni50-xFex alloys were investigated by means of optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Results indicate that, as a substitute for Ni, Fe added to TiNi alloys can dramatically decrease the martensite transformation temperature and R phase transformation and martensite transformation are accordingly separated. The results show that TiNiFe alloys exhibit two-step martensitic transformation. The start temperature of martensitic transformation increases sharply from 212 K to 267 K when 2% Fe is added in, and then decreases gradually if Fe content further increases. The hardness of TiNiFe ternary alloys before heat treatment is constant for up to 6% of the composition and suddenly increases for 9% composition and also it behaves same for heat treated specimens because of formation of equilibrium precipitates Ni3Ti formation. 2017 Elsevier Ltd.

Source

Materials Today: Proceedings, Vol-4, No. 10, pp. 11251-11259.

Date

2017-01-01

Publisher

Elsevier Ltd

Subject

Martensite Transformation; Mechanical Properties; Microstructure; Shape Memory Alloy; TiNiFe

Coverage

Naresh H., Christ University, Bengaluru, 560074, India; Bharath H.S., Siddaganga Institute of Technology, BH Road Tumkur, 572106, India; Prashantha S., Siddaganga Institute of Technology, BH Road Tumkur, 572106, India

Rights

Restricted Access

Relation

ISSN: 22147853

Format

Online

Language

English

Type

Conference paper

Identifier

https://doi.org/10.1016/j.matpr.2017.09.047

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