Mechanical characterization of as-cast AA7075/6060 and CuSn6/Cu99.5 compounds using an experimental and numerical push-out test

Mechanical characterization of as-cast AA7075/6060 and CuSn6/Cu99.5 compounds using an experimental and numerical push-out test
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使用实验和数值推出测试对铸态 AA7075/6060 和 CuSn6/Cu99 5 化合物进行机械表征

DOI:
10.1016/j.msea.2019.02.080
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发表时间:
2019
期刊:
Materials Science and Engineering: A
影响因子:
--
通讯作者:
W. Volk
W. Volk
中科院分区:
--
文献类型:
--
作者:
J. Stahl;T. Mittler;L. Spano;H. Chen;N. Ben Khalifa;W. Volk

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本文介绍了一种用推出法测试旋转对称铸态双层化合物力学性能的实验方法和创新的数值方法。分别采用静态和半连续复合铸造方法制备了AA7075/6060和CuSn6/Cu99.5复合材料。光学和力学测试方法显示出粘结特性和加入伙伴之间可以忽略不计的小过渡区。通过抗剪强度试验研究了混凝土的抗剪强度。通过有限元分析对实验结果进行了回顾。因此,确定了每种铸造材料的Johnson-Cock失效参数。随后,建立了多截面数值模型来模拟铸态双金属试件在顶出试验过程中的力学行为。最后,数值参数研究表明,界面处的优化载荷与模具间隙与试件厚度之比以及界面位置之间存在很强的相关性。
The present paper describes an experimental method and innovative numerical approach in the mechanical testing of rotationally symmetric, as-cast bilayer compounds using a push-out test. Specimens consisting of AA7075/6060 and CuSn6/Cu99.5 were fabricated by static and semi-continuous compound casting, respectively. Optical and mechanical testing methods showed a cohesive bonding character and a negligibly small transition zone between the joining partners. The shear strength was investigated by using an experimental push-out test. The experiments were reviewed by means of a finite element analysis. Therefore, Johnson-Cock failure parameters were determined for each casting material. Subsequently, a multi-sectional numerical model was built up to simulate the mechanical behavior of an as-cast bimetal sample during push-out testing. Lastly, a numerical parameter study yielded a strong dependency between optimized loads at the interface and the ratio of die clearance and sample thickness as well as the interface position.
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