A novel low-modulus titanium alloy for biomedical applications: A comparison between selective laser melting and metal injection moulding

Chanun Suwanpreecha; Enrique Alabort; Yuanbo T. Tang; Chinnapat Panwisawas; Roger C. Reed; Anchalee Manonukul

doi:10.1016/j.msea.2021.141081

A novel low-modulus titanium alloy for biomedical applications: A comparison between selective laser melting and metal injection moulding

Chanun Suwanpreecha, Enrique Alabort, Yuanbo T. Tang, Chinnapat Panwisawas, Roger C. Reed, Anchalee Manonukul^*

^*Corresponding author for this work

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

Abstract

The mechanical properties of new low-modulus beta titanium alloyed designed for biomedical applications are measured and compared when processed via the selective laser melting (SLM) and the metal injection moulding (MIM) processes. Mechanical tensile testing reveals important differences between them: (i) Under optimal laser settings, SLM produces strong, low-modulus and ductile properties. This is associated with the laser creating fully dense material with appropriate microstructure after solidification. (ii) MIM can produce materials with similar strength/stiffness ratios, but with reduced ductility. The differences between the processes are linked to changes in chemistry in the microstructure: carbon pickup from MIM binder and slow cooling rate is responsible for the appearance of Ti2C resulting in low ductility and very high strength together with a transition from intergranular to transgranular fracture.

Original language	English
Article number	141081
Number of pages	16
Journal	Materials Science and Engineering A
Volume	812
Early online date	13 Mar 2021
DOIs	https://doi.org/10.1016/j.msea.2021.141081
Publication status	Published - 22 Apr 2021

Bibliographical note

Acknowledgments:
C.S. and A.M. would like to acknowledge the funding from National Metal and Materials Technology Center, Thailand, under the grant number: P2051082; while Y.T. and C.P. from EPSRC UKRI Innovation Fellowship from Engineering and Physical Science Research Council (EPSRC, UK Research and Innovation, under the grant number: EP/S000828/2. C.S. and A.M. sincerely thank Dr. John T.H. Pearce for valuable discussions and proof reading, Mr. S. Songkuea and Mr. P. Seensattayawong for support during MIM sample preparation, Mr. V. Yodsri for TEM, Ms. V. Krongtong for SXES and Mr. T. Wutikhun for FIB, Taisei Kogyo (Thailand) Co., Ltd. for MIM binder and Dr. N. Taweejun, Thai Tohken Thermo Co., Ltd. for nanoindentation.

Keywords

Metal injection moulding
Selective laser melting
Biomedical titanium alloy
Titanium carbide
Low elastic modulus

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title = "A novel low-modulus titanium alloy for biomedical applications: A comparison between selective laser melting and metal injection moulding",

abstract = "The mechanical properties of new low-modulus beta titanium alloyed designed for biomedical applications are measured and compared when processed via the selective laser melting (SLM) and the metal injection moulding (MIM) processes. Mechanical tensile testing reveals important differences between them: (i) Under optimal laser settings, SLM produces strong, low-modulus and ductile properties. This is associated with the laser creating fully dense material with appropriate microstructure after solidification. (ii) MIM can produce materials with similar strength/stiffness ratios, but with reduced ductility. The differences between the processes are linked to changes in chemistry in the microstructure: carbon pickup from MIM binder and slow cooling rate is responsible for the appearance of Ti2C resulting in low ductility and very high strength together with a transition from intergranular to transgranular fracture.",

keywords = "Metal injection moulding, Selective laser melting, Biomedical titanium alloy, Titanium carbide, Low elastic modulus",

author = "Chanun Suwanpreecha and Enrique Alabort and Tang, {Yuanbo T.} and Chinnapat Panwisawas and Reed, {Roger C.} and Anchalee Manonukul",

note = "Acknowledgments: C.S. and A.M. would like to acknowledge the funding from National Metal and Materials Technology Center, Thailand, under the grant number: P2051082; while Y.T. and C.P. from EPSRC UKRI Innovation Fellowship from Engineering and Physical Science Research Council (EPSRC, UK Research and Innovation, under the grant number: EP/S000828/2. C.S. and A.M. sincerely thank Dr. John T.H. Pearce for valuable discussions and proof reading, Mr. S. Songkuea and Mr. P. Seensattayawong for support during MIM sample preparation, Mr. V. Yodsri for TEM, Ms. V. Krongtong for SXES and Mr. T. Wutikhun for FIB, Taisei Kogyo (Thailand) Co., Ltd. for MIM binder and Dr. N. Taweejun, Thai Tohken Thermo Co., Ltd. for nanoindentation.",

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AU - Suwanpreecha, Chanun

AU - Alabort, Enrique

AU - Tang, Yuanbo T.

AU - Panwisawas, Chinnapat

AU - Reed, Roger C.

AU - Manonukul, Anchalee

N1 - Acknowledgments: C.S. and A.M. would like to acknowledge the funding from National Metal and Materials Technology Center, Thailand, under the grant number: P2051082; while Y.T. and C.P. from EPSRC UKRI Innovation Fellowship from Engineering and Physical Science Research Council (EPSRC, UK Research and Innovation, under the grant number: EP/S000828/2. C.S. and A.M. sincerely thank Dr. John T.H. Pearce for valuable discussions and proof reading, Mr. S. Songkuea and Mr. P. Seensattayawong for support during MIM sample preparation, Mr. V. Yodsri for TEM, Ms. V. Krongtong for SXES and Mr. T. Wutikhun for FIB, Taisei Kogyo (Thailand) Co., Ltd. for MIM binder and Dr. N. Taweejun, Thai Tohken Thermo Co., Ltd. for nanoindentation.

PY - 2021/4/22

Y1 - 2021/4/22

N2 - The mechanical properties of new low-modulus beta titanium alloyed designed for biomedical applications are measured and compared when processed via the selective laser melting (SLM) and the metal injection moulding (MIM) processes. Mechanical tensile testing reveals important differences between them: (i) Under optimal laser settings, SLM produces strong, low-modulus and ductile properties. This is associated with the laser creating fully dense material with appropriate microstructure after solidification. (ii) MIM can produce materials with similar strength/stiffness ratios, but with reduced ductility. The differences between the processes are linked to changes in chemistry in the microstructure: carbon pickup from MIM binder and slow cooling rate is responsible for the appearance of Ti2C resulting in low ductility and very high strength together with a transition from intergranular to transgranular fracture.

AB - The mechanical properties of new low-modulus beta titanium alloyed designed for biomedical applications are measured and compared when processed via the selective laser melting (SLM) and the metal injection moulding (MIM) processes. Mechanical tensile testing reveals important differences between them: (i) Under optimal laser settings, SLM produces strong, low-modulus and ductile properties. This is associated with the laser creating fully dense material with appropriate microstructure after solidification. (ii) MIM can produce materials with similar strength/stiffness ratios, but with reduced ductility. The differences between the processes are linked to changes in chemistry in the microstructure: carbon pickup from MIM binder and slow cooling rate is responsible for the appearance of Ti2C resulting in low ductility and very high strength together with a transition from intergranular to transgranular fracture.

KW - Metal injection moulding

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KW - Biomedical titanium alloy

KW - Titanium carbide

KW - Low elastic modulus

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JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

M1 - 141081

ER -

A novel low-modulus titanium alloy for biomedical applications: A comparison between selective laser melting and metal injection moulding

Abstract

Bibliographical note

Keywords

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