The effects of machining on the microstructure and transformation behavior of NiTi Alloy

Y. Kaynak; H. Tobe; R. D. Noebe; H. E. Karaca; I. S. Jawahir

doi:10.1016/j.scriptamat.2013.10.023

The effects of machining on the microstructure and transformation behavior of NiTi Alloy

Y. Kaynak, H. Tobe, R. D. Noebe, H. E. Karaca, I. S. Jawahir

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

This study presents evidence of a machining-induced deformation layer in a NiTi shape memory alloy and the subsequent effect of this layer on the underlying transformation behavior of the material. Severe twinning-induced deformation was observed in the substrate of samples pre-cooled and machined by orthogonal cutting under cryogenic conditions, while (1 1 4)_B2-type deformation twinning and significant dislocation activity was observed after dry machining of the NiTi. In addition, cryogenic machining resulted in a much deeper affected zone than machining under dry conditions.

Original language	English
Pages (from-to)	60-63
Number of pages	4
Journal	Scripta Materialia
Volume	74
DOIs	https://doi.org/10.1016/j.scriptamat.2013.10.023
State	Published - Mar 2014

Bibliographical note

Funding Information:
Support from the NASA EPSCOR Program under Grant no. NNX11AQ31A and the NASA FAP Aeronautical Sciences Project are greatly acknowledged.

Keywords

Cryogenic machining
Machining-induced layer
NiTi
Shape memory alloys
Twinning deformation

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2013.10.023

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title = "The effects of machining on the microstructure and transformation behavior of NiTi Alloy",

abstract = "This study presents evidence of a machining-induced deformation layer in a NiTi shape memory alloy and the subsequent effect of this layer on the underlying transformation behavior of the material. Severe twinning-induced deformation was observed in the substrate of samples pre-cooled and machined by orthogonal cutting under cryogenic conditions, while (1 1 4)B2-type deformation twinning and significant dislocation activity was observed after dry machining of the NiTi. In addition, cryogenic machining resulted in a much deeper affected zone than machining under dry conditions.",

keywords = "Cryogenic machining, Machining-induced layer, NiTi, Shape memory alloys, Twinning deformation",

author = "Y. Kaynak and H. Tobe and Noebe, {R. D.} and Karaca, {H. E.} and Jawahir, {I. S.}",

note = "Funding Information: Support from the NASA EPSCOR Program under Grant no. NNX11AQ31A and the NASA FAP Aeronautical Sciences Project are greatly acknowledged.",

year = "2014",

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doi = "10.1016/j.scriptamat.2013.10.023",

language = "English",

volume = "74",

pages = "60--63",

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T1 - The effects of machining on the microstructure and transformation behavior of NiTi Alloy

AU - Kaynak, Y.

AU - Tobe, H.

AU - Noebe, R. D.

AU - Karaca, H. E.

AU - Jawahir, I. S.

N1 - Funding Information: Support from the NASA EPSCOR Program under Grant no. NNX11AQ31A and the NASA FAP Aeronautical Sciences Project are greatly acknowledged.

PY - 2014/3

Y1 - 2014/3

N2 - This study presents evidence of a machining-induced deformation layer in a NiTi shape memory alloy and the subsequent effect of this layer on the underlying transformation behavior of the material. Severe twinning-induced deformation was observed in the substrate of samples pre-cooled and machined by orthogonal cutting under cryogenic conditions, while (1 1 4)B2-type deformation twinning and significant dislocation activity was observed after dry machining of the NiTi. In addition, cryogenic machining resulted in a much deeper affected zone than machining under dry conditions.

AB - This study presents evidence of a machining-induced deformation layer in a NiTi shape memory alloy and the subsequent effect of this layer on the underlying transformation behavior of the material. Severe twinning-induced deformation was observed in the substrate of samples pre-cooled and machined by orthogonal cutting under cryogenic conditions, while (1 1 4)B2-type deformation twinning and significant dislocation activity was observed after dry machining of the NiTi. In addition, cryogenic machining resulted in a much deeper affected zone than machining under dry conditions.

KW - Cryogenic machining

KW - Machining-induced layer

KW - NiTi

KW - Shape memory alloys

KW - Twinning deformation

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DO - 10.1016/j.scriptamat.2013.10.023

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SN - 1359-6462

VL - 74

SP - 60

EP - 63

JO - Scripta Materialia

JF - Scripta Materialia

ER -

The effects of machining on the microstructure and transformation behavior of NiTi Alloy

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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