A Study on Hot Tearing Susceptibility of Al-Cu, Al-Mg, and Al-Zn alloys

作者：Birru A K; Karunakar D Benny; Mahapatra M M^*

来源：Transactions of the Indian Institute of Metals, 2012, 65(1): 97-105.

DOI：10.1007/s12666-011-0112-7

• Hot tearing
• Pouring temperature
• Grain size

The present investigation deals with the hot tearing susceptibility of A206, A518, and A713 alloys. The hot tearing tests of the mentioned alloys were conducted at three different pouring temperatures using sand mold casting. Metallic cores designed to facilitate constrained radial contraction of the aforementioned alloys were used for casting. Macroscopic cracks were found in all the samples except in A518 alloy. It was observed that pouring temperatural and grain size have significant effect on crack susceptibility. Among the investigated alloys, A713 was found to be extremely prone to hot tearing. The microstructure characteristics of the alloys were studied using optical and scanning electron microscopy. Relationships between the pouring temperature, grain size and crack lengths of the alloys were also established.

• 出版日期2012-2