Search: onr:"swepub:oai:research.chalmers.se:06545670-4f4d-48b1-a11e-d2ab876b8d21" >
Anisotropy in Therm...
Anisotropy in Thermal Transport Properties of Cast γ-TiAl Alloys
-
- Lundstrom, Dennis (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Karlsson, Birger, 1941 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Gustavsson, Mattias (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
(creator_code:org_t)
- 2022
- 2022
- English.
-
In: International Journal of Materials Research. - 1862-5282. ; 92:11, s. 1203-1212
- Related links:
-
https://research.cha...
Abstract
Subject headings
Close
- The thermal transport properties have been determined for titanium aluminide with nominal composition Ti-48Al-2W-0.5Si (at.%), cast to cylindrical bars with different gamma/(gamma + alpha(2)) microstructures. The amount of phases and the orientation of the lamellar plates vary from the core to the rim in each of the bars. Differences in the thermal conductivity of the two phases lead to anisotropy in the thermal transport properties, but with cylindrical symmetry in the bars. A newly developed, high-precision technique, the so-called transient plane source (TPS) technique, was used to resolve the anisotropy in a wide temperature range. Typically, the conductivity increases monotonously from about 12- 14 W/m center dot K at room temperature up to about 20-22 W/m center dot K at 700 degrees C for the different materials. The anisotropy in both conductivity and diffusivity is about 15% at all temperatures, but with fundamental differences between the different materials. The anisotropy of the transport properties is explained in terms of amounts of phases and directionality of the lamellar plates.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Keramteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Ceramics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Anisotropy
- Microstructure
- Thermal conductivity
- Titanium aluminides
- Transient plane source (TPS) technique
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database