The influence of advanced hot isostatic pressing on phase transformations, mechanical properties of Ti-34Nb-13Ta-5Zr-0.2O alloy manufactured by In-situ alloying via selective laser melting

Weihuan Kong; Elisabeth M. Francis; Qi Shi; Sophie C. Cox; Feng Wang; Min Kuang; Moataz M. Attallah

doi:10.1016/j.jallcom.2022.163974

The influence of advanced hot isostatic pressing on phase transformations, mechanical properties of Ti-34Nb-13Ta-5Zr-0.2O alloy manufactured by In-situ alloying via selective laser melting

Weihuan Kong, Elisabeth M. Francis, Qi Shi, Sophie C. Cox, Feng Wang, Min Kuang, Moataz M. Attallah^*

^*Corresponding author for this work

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

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Abstract

In this paper, advanced hot isostatic pressing (HIP) subjected to high and intermediate cooling rate (HCR & ICR) were exploited to close keyholes and tune the microstructure of SLMed Ti-34 Nb-13Ta-5Zr-0.2 O alloys (TNT5Zr-0.2 O, wt%). XRD analysis along with SEM and TEM micrographs reveal single beta phase in grain matrix of as-fabricated TNT5Zr-0.2 O (TNT5Zr-0.2 O-AF), TNT5Zr-0.2 O-HCR, TNT5Zr-0.2 O-ICR alloys. Additionally, high-angle annular dark-field (HAADF) micrographs show discrete large Ti-rich α grain boundary precipitates in TNT5Zr-0.2 O-ICR alloy. Tensile properties show that TNT5Zr-0.2 O-AF alloy possessed high UTS of 975 ± 12 MPa, and elongation of 4.9% ± 0.3%; the TNT5Zr-0.2 O-ICR alloy obtained slightly higher UTS (1036 ± 26 MPa) and lower elongation (3.0% ± 0.3%). S-N curves demonstrate fatigue limit of TNT5Zr-0.2 O-ICR alloy (150 MPa) is slightly higher than the counterpart of TNT5Zr-0.2 O-AF alloy (130 MPa), and slip-band cracking phenomenon was observed in both alloys. Advanced HIP subjected to intermediate cooling rate functions well to close SLM-processed keyholes but the resistance to fatigue is not markedly enhanced; the addition of proper amount oxygen interstitial solutes in TNTZ-O alloy is regarded as an inexpensive, effective strengthening technique for load-bearing biomedical applications.

Original language	English
Article number	163974
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	903
Early online date	29 Jan 2022
DOIs	https://doi.org/10.1016/j.jallcom.2022.163974
Publication status	Published - 15 May 2022

Bibliographical note

Funding Information:
Weihuan Kong acknowledges the support for the TEM characterization work provided by Centre for Electron Microscopy, University of Birmingham and Henry Royce Institute for Advanced Materials, funded through the UK's Engineering and Physical Sciences Research Council ( EPSRC ) grants EP/R00661X/1 , EP/S019367/1 , EP/P025021/1 and EP/P025498/1 .

Keywords

Fatigue properties
Hot isostatic pressing
Phase transformations
Selective laser melting
Strength-to-modulus ratio
β Ti alloy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Cite this

Kong, W., Francis, E. M., Shi, Q., Cox, S. C., Wang, F., Kuang, M., & Attallah, M. M. (2022). The influence of advanced hot isostatic pressing on phase transformations, mechanical properties of Ti-34Nb-13Ta-5Zr-0.2O alloy manufactured by In-situ alloying via selective laser melting. Journal of Alloys and Compounds, 903, Article 163974. https://doi.org/10.1016/j.jallcom.2022.163974

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abstract = "In this paper, advanced hot isostatic pressing (HIP) subjected to high and intermediate cooling rate (HCR & ICR) were exploited to close keyholes and tune the microstructure of SLMed Ti-34 Nb-13Ta-5Zr-0.2 O alloys (TNT5Zr-0.2 O, wt%). XRD analysis along with SEM and TEM micrographs reveal single beta phase in grain matrix of as-fabricated TNT5Zr-0.2 O (TNT5Zr-0.2 O-AF), TNT5Zr-0.2 O-HCR, TNT5Zr-0.2 O-ICR alloys. Additionally, high-angle annular dark-field (HAADF) micrographs show discrete large Ti-rich α grain boundary precipitates in TNT5Zr-0.2 O-ICR alloy. Tensile properties show that TNT5Zr-0.2 O-AF alloy possessed high UTS of 975 ± 12 MPa, and elongation of 4.9% ± 0.3%; the TNT5Zr-0.2 O-ICR alloy obtained slightly higher UTS (1036 ± 26 MPa) and lower elongation (3.0% ± 0.3%). S-N curves demonstrate fatigue limit of TNT5Zr-0.2 O-ICR alloy (150 MPa) is slightly higher than the counterpart of TNT5Zr-0.2 O-AF alloy (130 MPa), and slip-band cracking phenomenon was observed in both alloys. Advanced HIP subjected to intermediate cooling rate functions well to close SLM-processed keyholes but the resistance to fatigue is not markedly enhanced; the addition of proper amount oxygen interstitial solutes in TNTZ-O alloy is regarded as an inexpensive, effective strengthening technique for load-bearing biomedical applications.",

keywords = "Fatigue properties, Hot isostatic pressing, Phase transformations, Selective laser melting, Strength-to-modulus ratio, β Ti alloy",

author = "Weihuan Kong and Francis, {Elisabeth M.} and Qi Shi and Cox, {Sophie C.} and Feng Wang and Min Kuang and Attallah, {Moataz M.}",

note = "Funding Information: Weihuan Kong acknowledges the support for the TEM characterization work provided by Centre for Electron Microscopy, University of Birmingham and Henry Royce Institute for Advanced Materials, funded through the UK's Engineering and Physical Sciences Research Council ( EPSRC ) grants EP/R00661X/1 , EP/S019367/1 , EP/P025021/1 and EP/P025498/1 .",

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The influence of advanced hot isostatic pressing on phase transformations, mechanical properties of Ti-34Nb-13Ta-5Zr-0.2O alloy manufactured by In-situ alloying via selective laser melting. / Kong, Weihuan; Francis, Elisabeth M.; Shi, Qi et al.
In: Journal of Alloys and Compounds, Vol. 903, 163974, 15.05.2022.

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

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AU - Kong, Weihuan

AU - Francis, Elisabeth M.

AU - Shi, Qi

AU - Cox, Sophie C.

AU - Wang, Feng

AU - Kuang, Min

AU - Attallah, Moataz M.

N1 - Funding Information: Weihuan Kong acknowledges the support for the TEM characterization work provided by Centre for Electron Microscopy, University of Birmingham and Henry Royce Institute for Advanced Materials, funded through the UK's Engineering and Physical Sciences Research Council ( EPSRC ) grants EP/R00661X/1 , EP/S019367/1 , EP/P025021/1 and EP/P025498/1 .

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N2 - In this paper, advanced hot isostatic pressing (HIP) subjected to high and intermediate cooling rate (HCR & ICR) were exploited to close keyholes and tune the microstructure of SLMed Ti-34 Nb-13Ta-5Zr-0.2 O alloys (TNT5Zr-0.2 O, wt%). XRD analysis along with SEM and TEM micrographs reveal single beta phase in grain matrix of as-fabricated TNT5Zr-0.2 O (TNT5Zr-0.2 O-AF), TNT5Zr-0.2 O-HCR, TNT5Zr-0.2 O-ICR alloys. Additionally, high-angle annular dark-field (HAADF) micrographs show discrete large Ti-rich α grain boundary precipitates in TNT5Zr-0.2 O-ICR alloy. Tensile properties show that TNT5Zr-0.2 O-AF alloy possessed high UTS of 975 ± 12 MPa, and elongation of 4.9% ± 0.3%; the TNT5Zr-0.2 O-ICR alloy obtained slightly higher UTS (1036 ± 26 MPa) and lower elongation (3.0% ± 0.3%). S-N curves demonstrate fatigue limit of TNT5Zr-0.2 O-ICR alloy (150 MPa) is slightly higher than the counterpart of TNT5Zr-0.2 O-AF alloy (130 MPa), and slip-band cracking phenomenon was observed in both alloys. Advanced HIP subjected to intermediate cooling rate functions well to close SLM-processed keyholes but the resistance to fatigue is not markedly enhanced; the addition of proper amount oxygen interstitial solutes in TNTZ-O alloy is regarded as an inexpensive, effective strengthening technique for load-bearing biomedical applications.

AB - In this paper, advanced hot isostatic pressing (HIP) subjected to high and intermediate cooling rate (HCR & ICR) were exploited to close keyholes and tune the microstructure of SLMed Ti-34 Nb-13Ta-5Zr-0.2 O alloys (TNT5Zr-0.2 O, wt%). XRD analysis along with SEM and TEM micrographs reveal single beta phase in grain matrix of as-fabricated TNT5Zr-0.2 O (TNT5Zr-0.2 O-AF), TNT5Zr-0.2 O-HCR, TNT5Zr-0.2 O-ICR alloys. Additionally, high-angle annular dark-field (HAADF) micrographs show discrete large Ti-rich α grain boundary precipitates in TNT5Zr-0.2 O-ICR alloy. Tensile properties show that TNT5Zr-0.2 O-AF alloy possessed high UTS of 975 ± 12 MPa, and elongation of 4.9% ± 0.3%; the TNT5Zr-0.2 O-ICR alloy obtained slightly higher UTS (1036 ± 26 MPa) and lower elongation (3.0% ± 0.3%). S-N curves demonstrate fatigue limit of TNT5Zr-0.2 O-ICR alloy (150 MPa) is slightly higher than the counterpart of TNT5Zr-0.2 O-AF alloy (130 MPa), and slip-band cracking phenomenon was observed in both alloys. Advanced HIP subjected to intermediate cooling rate functions well to close SLM-processed keyholes but the resistance to fatigue is not markedly enhanced; the addition of proper amount oxygen interstitial solutes in TNTZ-O alloy is regarded as an inexpensive, effective strengthening technique for load-bearing biomedical applications.

KW - Fatigue properties

KW - Hot isostatic pressing

KW - Phase transformations

KW - Selective laser melting

KW - Strength-to-modulus ratio

KW - β Ti alloy

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The influence of advanced hot isostatic pressing on phase transformations, mechanical properties of Ti-34Nb-13Ta-5Zr-0.2O alloy manufactured by In-situ alloying via selective laser melting

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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