Effect of Al5Ti1B Master Alloy on Microstructure and Mechanical Properties of Al-5wt.%Cu based Alloy

Ming Yu Xie; Si Hai Ao; Xiang Wang

doi:10.4028/www.scientific.net/AMR.1051.195

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1051Effect of Al5Ti1B Master Alloy on Microstructure...

Effect of Al5Ti1B Master Alloy on Microstructure and Mechanical Properties of Al-5wt.%Cu based Alloy

Abstract:

The Al-5wt.%Cu based alloy with different levels of Al5Ti1B master alloy additions have been prepared by conventional casting method. The effect of Al5Ti1B contents on microstructure of Al-Cu based alloy was studied by means of XRD, OM and SEM. The results show that when the addition level of Al5Ti1B master alloy is less than 0.6wt.%, the average grain size of the alloys decreases with the increase of Al5Ti1B content. But the grain size increases somewhat with further addition of Al5Ti1B. It is considered that TiB₂ particles can serve as the heterogeneous nucleation sites of α-Al during solidification, and heterogeneous nucleation is the main reason of the grain refinement of Al-Cu based alloy. The superior comprehensive mechanical properties of tensile strength of 435 MPa and elongation of 11% of the refined Al-5wt.%Cu based alloy with 0.6% Al5Ti1B were obtained after solution and aging treatment.

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Periodical:

Advanced Materials Research (Volume 1051)

Pages:

195-198

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1051.195

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Online since:

October 2014

Authors:

Ming Yu Xie, Si Hai Ao, Xiang Wang*

Keywords:

Al5Ti1B Master Alloy, Al-5wt.%Cu Based Alloy, Grain Refinement, Mechanical Property

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