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Advanced mechanical properties of powder metallurgy commercially pure titanium with a high oxygen concentration

Published online by Cambridge University Press:  22 August 2017

Biao Chen ,
Jianghua Shen Open the ORCID record for Jianghua Shen [Opens in a new window] ,
Xiaoxin Ye ,
Junko Umeda  and
Katsuyoshi Kondoh
Biao Chen*
Affiliation:
Joining and Welding Research Institute, Osaka University, Ibaraki City, Osaka 567-0047, Japan
Jianghua Shen*
Affiliation:
Joining and Welding Research Institute, Osaka University, Ibaraki City, Osaka 567-0047, Japan
Xiaoxin Ye
Affiliation:
Joining and Welding Research Institute, Osaka University, Ibaraki City, Osaka 567-0047, Japan
Junko Umeda
Affiliation:
Joining and Welding Research Institute, Osaka University, Ibaraki City, Osaka 567-0047, Japan
Katsuyoshi Kondoh
Affiliation:
Joining and Welding Research Institute, Osaka University, Ibaraki City, Osaka 567-0047, Japan
*
a) Address all correspondence to this author. e-mail: [email protected], [email protected]
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Abstract

Oxygen is known to have a significant impact on the strength of Ti alloys, whereas it can also reduce the ductility substantially. Thus, the usage of oxygen to strengthen Ti is restricted in the industry. In this study, we rekindled the research of oxygen behavior in Ti with the purpose of developing Ti alloys with high strength and suitable ductility by using no expensive and poisonous element. To this end, experiments of producing high performance commercially pure Ti using only oxygen solid solution were carried out. The oxygen element was introduced into the Ti by two different powder metallurgy methods. The microstructural examination and mechanical test were performed for the samples, which indicated a strong hardening effect of oxygen in spite of the processing routes. Most importantly, the results suggested that a high elongation to failure of over 20% can still be obtained in the samples having yield stress over 800 MPa, up to an oxygen content of 0.8 wt%, which is far beyond the previously recognized limit.

Keywords

pure Tioxygenpowder metallurgymechanical properties
Type
Invited Paper
Information
Journal of Materials Research , Volume 32 , Issue 19 , 16 October 2017 , pp. 3769 - 3776
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

b)

These authors contributed equally to this work.

Contributing Editor: Jürgen Eckert

References

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