The Strengthening Effect of Phase Boundaries in a Severely Plastically Deformed Ti-Al Composite Wire

Metals

Tom Marr²  Jens Freudenberger²  Verena Maier¹  Heinz Werner Höppel¹  Mathias Göken¹ 

[1] Department Werkstoffwissenschaften, Lehrstuhl für Allgemeine Werkstoffeigenschaften, Universit¨at Erlangen-Nürnberg, Martensstr. 5, Erlangen 91058, Germany; E-Mails:;IFW Dresden, Institut für Metallische Werkstoffe, Helmholtzstraße 20, Dresden 01069, Germany; E-Mails:

关键词: SPD;    Ti;    Al;    nanoindentation;    mechanical properties;   

DOI  :  10.3390/met4010037

来源: mdpi

【 摘 要 】

An accumulative swaging and bundling technique is used to prepare composite wires made of Ti and an Al alloy. These wires show reasonable higher yield stresses than expected from the pure material how curves. The additional strengthening in the composite is analyzed using nanoindentation measurements, tensile testings and investigations of the microstructure. In addition, these properties are analyzed in relation to the fracture surface of the mechanically tested wires. Additional strengthening due to the presence of phase boundaries could be verified. Indications for residual stresses are found that cause a global hardness gradient from the center to the wire rim. Finally, the yield stress of the wires are calculated based on local hardness measurements.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland