Transactions of Materials and Heat Treatment

Title：Study on flow deformation behavior of high strength aluminum alloy 7A04 at elevated temperature

Authors： GUO Xiao-yan XIAO Yan-hong LAN Hui LIU Han-xiong GUO Cheng

Unit： Xi'an Jiaotong University Shaanxi Qinchuan Machinery Development Co. Ltd.

KeyWords： flow stress equation thermal compression test hot deformation

ClassificationCode：TG376.2

year,vol(issue):pagenumber：2011,36(4):138-142

Abstract：

The elevated temperature flow deformation behavior of 7A04 aluminum alloys was studied by thernal compression test at the temperature of 300500 ℃ and at strain rate of 0.0110s-1 with Gleeble 1500 thermal simulator．The results show that the flow stress increases with the increase of strain rate and decreases with the increase of deformation temperature．A flow stress equation incorporating the effects of temperature, strain rate and strain was proposed. Comparisons between the experimental and predicted results were satisfactory，which confirms that the flow stress equations can be used in computer code to model the hot forming process of 7A04 aluminum alloy part under the prevailing loading conditions.

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