Effect of in-situ formed Al3Ti particles on the microstructure and mechanical properties of 6061 Al alloy

International Conference on Recent Advances in Materials, Mechanical and Civil Engineering

材料科学;机械制造;土木建筑工程

Gupta, Rahul^1 ; Chaudhari, G.P.^1 ; Daniel, B.S.S.^1

Cellular and Composite Materials Lab, Department of Metallurgical and Materials Engineering, IIT Roorkee, Roorkee

Uttarakhand

247667, India^1

关键词: Inorganic salts;    Liquid metallurgies;    Mechanical properties analysis;    Microstructure and mechanical properties;    Nucleating effect;    Particles reinforced;    Titanium tri-aluminide;    Ultimate tensile strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/330/1/012012/pdf
DOI  :  10.1088/1757-899X/330/1/012012

来源: IOP

【 摘 要 】

In this study, in situ Titanium-tri-aluminide (Al3Ti) particles reinforced Al 6061 alloy matrix composites were fabricated by the reaction of potassium hexafluorotitanate (K2TiF6) inorganic salt with molten Al 6061 alloy via liquid metallurgy route. The development of in-situ Al3Ti particles and their effects on the mechanical properties such as yield strength (YS), ductility, ultimate tensile strength (UTS) and hardness, and microstructure of Al 6061 alloy were studied. It was observed from the results that in-situ formed Al3Ti particles were blocky in morphology whose average size was around 2.6 ± 1.1 μm. Microstructure studies showed that grain size of Al matrix was reduced due to the nucleating effect of Al3Ti particles. It was observed from the mechanical properties analysis that when the volume fraction of Al3Ti particles was increased, the hardness, UTS and YS of the composites were also increased as compared to that of Al 6061 alloy. An improvement in ductility was observed with the dispersion of Al3Ti particles in base alloy which is contrary to many other composites.