This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2006.02.039 in citations.
In situ creep under helium implantation of titanium-aluminium alloy
In situ creep under helium implantation of titanium-aluminium alloy
The intermetallic alloy Ti-47Al-2W-0.5Si (at.%) has been homogeneously implanted with He-4(2+) ions under uniaxial tensile stresses from 20 to 450 MPa to a maximum dose of about 0.16 dpa (1370 appm-He) with displacement damage rates of 2 x 10(-6) dpa s(-1) at temperatures of 573 and 773 K. Strain un...
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Personal Name(s): | Chen, J. |
---|---|
Jung, P. / Nazmy, M. / Hoffelner, W. | |
Contributing Institute: |
Streumethoden; IFF-ISM |
Published in: | Journal of nuclear materials, 352 (2006) S. 36 - 41 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2006
|
Physical Description: |
36 - 41 |
DOI: |
10.1016/j.jnucmat.2006.02.039 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) Kondensierte Materie |
Series Title: |
Journal of Nuclear Materials
352 |
Subject (ZB): | |
Publikationsportal JuSER |
The intermetallic alloy Ti-47Al-2W-0.5Si (at.%) has been homogeneously implanted with He-4(2+) ions under uniaxial tensile stresses from 20 to 450 MPa to a maximum dose of about 0.16 dpa (1370 appm-He) with displacement damage rates of 2 x 10(-6) dpa s(-1) at temperatures of 573 and 773 K. Strain under implantation was determined by Linear Variable Displacement Transformer (LVDT), while changes of microstructure were investigated after implantation by Transmission Electron Microscopy (TEM). Irradiation creep strain showed a pronounced transient behaviour, virtually independent of temperature, with a stress dependence which can be approximately described by a creep compliance of 8 X 10(-6) dpa(-1) MPa-1 up to stresses of 350 MPa. The microstructure of the as-received material consisted of a patch-work of mainly lamellar gamma/alpha(2) colonies and equiaxed gamma-grains with islands of precipitates. Only 'black dot' damage was observed after implantation at 573 K under different stresses, while implantation at 773 K yielded a dense population of bubbles and dislocation loops, mostly mutually attached. (c) 2006 Elsevier B.V. All rights reserved. |