Tensile behavior of orthorhombic α″-titanium alloy studied by in situ X-ray diffraction

✍ Scribed by X.D. Wang; H.B. Lou; K. Ståhl; J. Bednarcik; H. Franz; J.Z. Jiang

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 504 KB
• Volume: 527
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2010.06.065

✦ Synopsis

The tensile behavior of a Ti-11%Zr-14%Nb-10%Sn alloy with pure orthorhombic ˛ phase was studied by in situ X-ray diffraction using synchrotron radiation. It is found that no phase transformation happens during the whole tensile process. The "double-yielding" platforms of this alloy are indeed due to a low stress yielding (∼400 MPa) followed with a significant work-hardening before necking and fracture. In this process, the [0 2 2] orientation of grains more approaches the tensile direction and the [2 0 0] moves to the transverse, causing the lattice parameter a to be shrunk, and b and c elongated, and the formation of texture. The similar texture can also be produced upon cold rolling by which the yield strength of the ˛" phase is largely improved to be over 900 MPa.