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Ti-Al Composite Wires with High Specific Strength
IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany
Technische Universit¨at Dresden, Institute of Materials Science, Dresden 01062, Germany
Technische Universit¨at Bergakademie Freiberg, Institute of Materials Science, Freiberg 09599, Germany
Technische Universit¨at Dresden, Institute of Structural Physics, Dresden 01062, Germany
* Author to whom correspondence should be addressed.
Received: 7 October 2011; in revised form: 29 October 2011 / Accepted: 11 November 2011 / Published: 17 November 2011
Abstract: An alternative deformation technique was applied to a composite made of titanium and an aluminium alloy in order to achieve severe plastic deformation. This involves accumulative swaging and bundling. Furthermore, it allows uniform deformation of a composite material while producing a wire which can be further used easily. Detailed analysis concerning the control of the deformation process, mesostructural and microstructural features and tensile testing was carried out on the as produced wires. A strong grain refinement to a grain size of 250–500 nm accompanied by a decrease in 〈111〉 fibre texture component and a change from low angle to high angle grain boundary characteristics is observed in the Al alloy. A strong increase in the mechanical properties in terms of ultimate tensile strength ranging from 600 to 930 MPa being equivalent to a specific strength of up to 223 MPa/g/cm3 was achieved.
Keywords: severe plastic deformation; accumulative deformation; ultra fine grained materials; light weight metals; titanium; aluminium; wire; specific strength
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Marr, T.; Freudenberger, J.; Seifert, D.; Klauß, H.; Romberg, J.; Okulov, I.; Scharnweber, J.; Eschke, A.; Oertel, C.-G.; Skrotzki, W.; Kühn, U.; Eckert, J.; Schultz, L. Ti-Al Composite Wires with High Specific Strength. Metals 2011, 1, 79-97.
Marr T, Freudenberger J, Seifert D, Klauß H, Romberg J, Okulov I, Scharnweber J, Eschke A, Oertel C-G, Skrotzki W, Kühn U, Eckert J, Schultz L. Ti-Al Composite Wires with High Specific Strength. Metals. 2011; 1(1):79-97.
Marr, Tom; Freudenberger, Jens; Seifert, Dirk; Klauß, Hansjörg; Romberg, Jan; Okulov, Ilya; Scharnweber, Juliane; Eschke, Andy; Oertel, Carl-Georg; Skrotzki, Werner; Kühn, Uta; Eckert, Jürgen; Schultz, Ludwig. 2011. "Ti-Al Composite Wires with High Specific Strength." Metals 1, no. 1: 79-97.