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Effect of Hydrogen on the Superplastic Behavior of Ti-6Al-4V Alloy

Published online by Cambridge University Press:  16 February 2011

B. Gong ,
C. B. Zeang ,
Z. H. Lai  and
Z. S. Xu
B. Gong
Affiliation:
Physics Department, Northeast University of Technology, Shenyang, 110006, P. R. China
C. B. Zeang
Affiliation:
Physics Department, Northeast University of Technology, Shenyang, 110006, P. R. China
Z. H. Lai
Affiliation:
Physics Department, Northeast University of Technology, Shenyang, 110006, P. R. China
Z. S. Xu
Affiliation:
Physics Department, Northeast University of Technology, Shenyang, 110006, P. R. China
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Abstract

The superplastic behaviour of Ti-6Al-4V alloy containing various amounts of hydrogen (0.07 ∼ 0.33wt%) has been investigated by tensile tests at temperatures of 800 ∼ 950°C. Results show that the solution of hydrogen in the alloy helps to reduce the flow stress with strain rate in the range of 1.67 ×10−4 ∼ 1.67×10−2 s−1 and makes the temperature of superplastlc deformation become Lower (810∼870°C). Nevertheless, it also causes a decrease of the strain rate sensitivity exponent and tensileelongation, However, by a suitable alloying with hydrogen (∼ 0.1wt%), the alloy can be made to undergo superplastlc deformation at a rather tow temperature (840°C) with an acceptable loss of superptastic ductility.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 196: Symposium T – Superplasticity in Metals, Ceramics, and Intermetallics , 1990 , 289
Copyright
Copyright © Materials Research Society 1990

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References

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