Session A: Light MetalsNo Access

EFFECT OF CARBON AND OXYGEN ADDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Ti-4.3Fe-7.1Cr-3Al ALLOY

The State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People's Republic of China

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LONG CHEN

The State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People's Republic of China

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KUN LI

The State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People's Republic of China

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GUOLIANG CHEN

The State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People's Republic of China

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https://doi.org/10.1142/S0217979209060075Cited by:1 (Source: Crossref)

Abstract

The effects of carbon and oxygen additions on the microstructure and mechanical properties of a new type low-cost beta titanium alloy Ti-4.3Fe-7.1Cr-3Al have been studied. The results showed that with the carbon addition the grain size was refined significantly, followed by the tensile strength increase and ductility improvement. At 0.2 wt.% carbon addition the 0.2%YS increased by 22% and elongation increased to a peak value of 23%. Also with the carbon addition the oxygen content in the alloy could be allowed to reach 0.2wt.% without tensile property decrease. After ageing treatment, it was found that ageing temperature other than carbon content played a key role on the α-phase precipitation and ageing hardness. The hot-rolling deformation accelerated the ageing response. The optimal ageing process was decided to be 500°C for 1h under the pretreatment of 850°C hot-rolling followed by immediately water quenching. The reasons for these improvements were discussed in terms of the carbide pinning and α-phase precipitation.

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References

C. Leyens and M. M. Peters , Titanium and Titanium Alloys: Fundamentals and Applications ( Wiley-VCH , Weinheim , 2003 ) . Google Scholar
A. D. Hartman, S. J. Gerdemann and J. S. Hansen, JOM 50, 16 (1998), DOI: 10.1007/s11837-998-0408-1. Web of Science, Google Scholar
K. Faller and F. H. Froes, JOM 53, 27 (2001), DOI: 10.1007/s11837-001-0143-3. Web of Science, Google Scholar
J. I. Qazi, B. Marquardt and H. J. Rack, JOM 56, 49 (2004), DOI: 10.1007/s11837-004-0253-9. Web of Science, Google Scholar
D. Sugano and M. Ikeda, Mater. Sci. Eng. C 25, 377 (2005), DOI: 10.1016/j.msec.2005.01.021. Web of Science, Google Scholar
G. Z. Chen, D. J. Fray and T. W. Farthing, Nature 407, 361 (2000). Web of Science, ADS, Google Scholar
P. A. Kobryn and S. L. Semiatin, JOM 53, 40 (2001), DOI: 10.1007/s11837-001-0068-x. Web of Science, Google Scholar
B. Hurless and F. H. Froes, Adv. Mater. Proc. 10, 59 (2002). Google Scholar
M. Ikedaet al., Mater. Trans. 45, 1566 (2004), DOI: 10.2320/matertrans.45.1566. Web of Science, Google Scholar
B. Gunawarmanet al., Mater. Sci. Eng. C 25, 304 (2005), DOI: 10.1016/j.msec.2004.12.015. Web of Science, Google Scholar
Z. Q. Chenet al., Mater. Sci. Tech. 20, 756 (2004), DOI: 10.1179/026708304225016806. Web of Science, Google Scholar
J. D. Pradoet al., J. Mater. Eng. Perf. 14, 728 (2005). Web of Science, Google Scholar
P. Bania, Beta Titanium Alloys in the 1990's, eds. D. Eylonet al. (TMS, Warrendale, 1993) p. 6. Google Scholar