Ti-Al Composite Wires with High Specific Strength

Metals

Tom Marr¹  Jens Freudenberger¹  Dirk Seifert¹  Hansjörg Klauß¹  Jan Romberg¹  Ilya Okulov¹  Juliane Scharnweber²  Andy Eschke²  Carl-Georg Oertel²  Werner Skrotzki²  Uta Kühn¹  Jürgen Eckert¹ 

[1]IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany

[2] E-Mails:

[3]Technische Universität Dresden, Institute of Structural Physics, Dresden 01062, Germany

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关键词: severe plastic deformation;    accumulative deformation;    ultra fine grained materials;    light weight metals;    titanium;    aluminium;    wire;    specific strength;   

DOI  :  10.3390/met1010079

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.