Mechanical properties of rapidly solidified Al-Ti alloys
after thermal exposure①
after thermal exposure①
(1. Department of Materials Science and Engineering, Zhejiang University,
Hangzhou 310027, P.R.China;
2. State Key Laboratory of Silicon Materials, Zhejiang University,
Hangzhou 310027, P.R.China)
Hangzhou 310027, P.R.China;
2. State Key Laboratory of Silicon Materials, Zhejiang University,
Hangzhou 310027, P.R.China)
Abstract: Mechanical properties, for example the elastic modulus, yield stress and ultimate tensile stress, of the rapidly solidified (RS) Al-Ti alloy after thermal exposure have been investigated using an Instron tensile test machine at a strain rate of 1.5×10-4s-1. The results show that the elastic modulus of the Al-Ti alloy increases with increasing Ti concentration, which can be predicted with Halpin-Tsai equation, Eshelby method and hereby re-modified shear lag model; the
yield strength and the ultimate tensile stress increase with increasing volume fraction and decreasing particle size of the Al3Ti and fine grain strengthening is suggested to be the main operative strengthening mechanism.
yield strength and the ultimate tensile stress increase with increasing volume fraction and decreasing particle size of the Al3Ti and fine grain strengthening is suggested to be the main operative strengthening mechanism.
Key words: Al-Ti alloy; grain strengthening; elastic modulus; mechanical properties