The Mechanical Properties Research of Stress Frame Casting under Different Solidification Conditions

Abstract:

This paper describes the cast structure study of A357 aluminum alloy stress frame casting under consecutive solidification and simultaneous solidification by test and numerical simulation methods, with the conclusions of tensile tests by using of SEM and EDS analysis, the mechanical properties and fracture morphology were observed both under the cast and T6 heat-treatment state. Intergranular fracture cracks were observed to be the main failure mode in the casting state condition, cracks originated from the tissue defects and continued to proliferate until the tensile specimens were ruptured. Simultaneous solidification can decrease the casting shrinkage and micro-cavity and improve the mechanical properties of the castings. Dimple fracture was the dominated failure mode after T6 heat treatment state, the distribution of some intergranular cracks staggered with dimple fracture can surveyed under the fractography analysis. The superiority of simultaneous solidification was demonstrated by the numerical simulation of China casting CAE.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 1406-1417
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.1406
• Online since: February 2012
• Authors: Zhen Zhong Fan, Yan Cai Xiong, Yong Jiang Zhou
• Keywords: A357 Aluminum Alloy, China Casting CAE, Mechanical Property, Solidification Mode, Stress Frame Casting

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