Effect of Al-TiB Addition on the Mechanical Properties and Microstructure of Al-ADC12/NanoSiC Produced by Stir Casting Methods

International Conference on Advanced Materials for Better Future 2017

Dhaneswara, D.^1 ; Zulfia, A.^1 ; Pramudita, T.P.^1 ; Ferdian, D.^1 ; Utomo, B.W.^2

Department of Metallurgy and Materials Engineering, Universitas Indonesia, Depok

16422, Indonesia^1

Astra Honda Motor, Cikarang Barat

17530, Indonesia^2

关键词: Grain refiner;    Intermetallic phase;    Magnesium addition;    Optimum number;    Properties and microstructures;    Properties of composites;    Stir casting;    Stir casting method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/333/1/012044/pdf
DOI  :  10.1088/1757-899X/333/1/012044

来源: IOP

【 摘 要 】

Addition of Ti-B grain refiner in Al-ADC12/nanoSiC composite results in improvement of tensile strength, hardness, and wear resistance through grain refinement. In this research, composite of Al-ADC12/nano SiC (0.15 %vf) with variations of TiB respectively (0.0), (0.02), (0.04), (0.06), dan (0.08) wt% were produced by stir casting. 10% of Mg were added to promote wettability between reinforce and matrix. It was found the best addition of TiB is 0.04 wt% Ti-B which results 135,9 MPa in tensile strength, 46 HRB in hardness, and 1.47x10-5mm3/s as wear rate. The increase in mechanical properties of composites mainly because of Al3Ti acts as nucleants which initiates the grain refinement and the existence of MgAl2O4phase indicates an interphase between nano SiC and ADC12 matrix. However, the increase of Ti-B addition after optimum number gives no significant results. High composition of iron and magnesium addition will form intermetallic phase β-Fe, π-Fe, and Mg2Si.