Martensitic transformation, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta alloys

Wen Tao Qu; Hao Gong; Jun Wang; Yong Sheng Nie; Yan Li

doi:10.1007/s12598-019-01305-3

Martensitic transformation, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta alloys

Wen Tao Qu, Hao Gong, Jun Wang, Yong Sheng Nie, Yan Li

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

23 Scopus citations

Abstract

Martensitic transformations, mechanical properties, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta (x = 15, 16, 17 and 18; at%) alloys were investigated. X-ray diffraction (XRD), optical microscopy (OM) and transmission electron microscopy (TEM) results indicated that the Ti–16Zr–14Nb–4Ta, Ti–17Zr–13Nb–4Ta and Ti–18Zr–12Nb–4Ta alloys were mainly composed of α″-martensite, while the Ti–15Zr–15Nb–4Ta alloy was characterized by predominant β phase. The reverse martensitic transformation temperatures increased when Nb was replaced by Zr, indicating stronger β-stabilizing effect for the former. The Ti–15Zr–15Nb–4Ta alloy displayed superelasticity during tensile deformation with a recovery strain of 3.51%. For the other three alloys with higher Zr content, the martensitic reorientation occurred during tensile deformation, resulting in shape memory recovery upon subsequent heating. The maximum shape memory effect was 3.46% in the Ti–18Zr–12Nb–4Ta alloy.

Original language	English
Pages (from-to)	965-970
Number of pages	6
Journal	Rare Metals
Volume	38
Issue number	10
DOIs	https://doi.org/10.1007/s12598-019-01305-3
State	Published - 1 Oct 2019
Externally published	Yes

Keywords

Martensitic transformation
Shape memory effect
Superelasticity
Ti–Zr alloys

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10.1007/s12598-019-01305-3

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title = "Martensitic transformation, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta alloys",

abstract = "Martensitic transformations, mechanical properties, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta (x = 15, 16, 17 and 18; at%) alloys were investigated. X-ray diffraction (XRD), optical microscopy (OM) and transmission electron microscopy (TEM) results indicated that the Ti–16Zr–14Nb–4Ta, Ti–17Zr–13Nb–4Ta and Ti–18Zr–12Nb–4Ta alloys were mainly composed of α″-martensite, while the Ti–15Zr–15Nb–4Ta alloy was characterized by predominant β phase. The reverse martensitic transformation temperatures increased when Nb was replaced by Zr, indicating stronger β-stabilizing effect for the former. The Ti–15Zr–15Nb–4Ta alloy displayed superelasticity during tensile deformation with a recovery strain of 3.51%. For the other three alloys with higher Zr content, the martensitic reorientation occurred during tensile deformation, resulting in shape memory recovery upon subsequent heating. The maximum shape memory effect was 3.46% in the Ti–18Zr–12Nb–4Ta alloy.",

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author = "Qu, {Wen Tao} and Hao Gong and Jun Wang and Nie, {Yong Sheng} and Yan Li",

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T1 - Martensitic transformation, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta alloys

AU - Qu, Wen Tao

AU - Gong, Hao

AU - Wang, Jun

AU - Nie, Yong Sheng

AU - Li, Yan

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Martensitic transformations, mechanical properties, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta (x = 15, 16, 17 and 18; at%) alloys were investigated. X-ray diffraction (XRD), optical microscopy (OM) and transmission electron microscopy (TEM) results indicated that the Ti–16Zr–14Nb–4Ta, Ti–17Zr–13Nb–4Ta and Ti–18Zr–12Nb–4Ta alloys were mainly composed of α″-martensite, while the Ti–15Zr–15Nb–4Ta alloy was characterized by predominant β phase. The reverse martensitic transformation temperatures increased when Nb was replaced by Zr, indicating stronger β-stabilizing effect for the former. The Ti–15Zr–15Nb–4Ta alloy displayed superelasticity during tensile deformation with a recovery strain of 3.51%. For the other three alloys with higher Zr content, the martensitic reorientation occurred during tensile deformation, resulting in shape memory recovery upon subsequent heating. The maximum shape memory effect was 3.46% in the Ti–18Zr–12Nb–4Ta alloy.

AB - Martensitic transformations, mechanical properties, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta (x = 15, 16, 17 and 18; at%) alloys were investigated. X-ray diffraction (XRD), optical microscopy (OM) and transmission electron microscopy (TEM) results indicated that the Ti–16Zr–14Nb–4Ta, Ti–17Zr–13Nb–4Ta and Ti–18Zr–12Nb–4Ta alloys were mainly composed of α″-martensite, while the Ti–15Zr–15Nb–4Ta alloy was characterized by predominant β phase. The reverse martensitic transformation temperatures increased when Nb was replaced by Zr, indicating stronger β-stabilizing effect for the former. The Ti–15Zr–15Nb–4Ta alloy displayed superelasticity during tensile deformation with a recovery strain of 3.51%. For the other three alloys with higher Zr content, the martensitic reorientation occurred during tensile deformation, resulting in shape memory recovery upon subsequent heating. The maximum shape memory effect was 3.46% in the Ti–18Zr–12Nb–4Ta alloy.

KW - Martensitic transformation

KW - Shape memory effect

KW - Superelasticity

KW - Ti–Zr alloys

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Martensitic transformation, shape memory effect and superelasticity of Ti–xZr–(30–x)Nb–4Ta alloys

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