Effect of Double Oxide Film Defects on Mechanical Properties of As-Cast C95800 Alloy
来源期刊：Acta Metallurgica Sinica2017年第6期
论文作者：Xin-Yi Zhao Zhi-Liang Ning Fu-Yang Cao Shan-Guang Liu Yong-Jiang Huang Jing-Shun Liu Jian-Fei Sun
文章页码：541 - 549
摘 要：The morphology of double oxide film defects and their influence on the tensile mechanical properties of a commercial Cu–Al（C95800） alloy were investigated in this study. Plane castings were produced with two types of pouring systems, and their tensile properties were measured and then analyzed by means of Weibull statistics method. The fracture surfaces of the tensile specimens were examined using scanning electron microscopy equipped with energy-dispersive spectroscopy. A large amount of double oxide film defects were observed on the tensile fractured specimens of the topfilled plane castings, and their chemical composition is identified to be Al2O3. Weibull statistics analyses showed that the double oxide film defects significantly reduce mechanical properties of the castings investigated. Furthermore, the ultimate tensile strength is more obviously deteriorated by double oxide film defects than elongation.
Xin-Yi Zhao1,2，Zhi-Liang Ning1,2，Fu-Yang Cao1,2，Shan-Guang Liu1,2，Yong-Jiang Huang1,2，Jing-Shun Liu3，Jian-Fei Sun1,2
1. School of Materials Science and Engineering, Harbin Institute of Technology2. National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology3. School of Materials Science and Engineering, Inner Mongolia University of Technology
摘 要：The morphology of double oxide film defects and their influence on the tensile mechanical properties of a commercial Cu–Al（C95800） alloy were investigated in this study. Plane castings were produced with two types of pouring systems, and their tensile properties were measured and then analyzed by means of Weibull statistics method. The fracture surfaces of the tensile specimens were examined using scanning electron microscopy equipped with energy-dispersive spectroscopy. A large amount of double oxide film defects were observed on the tensile fractured specimens of the topfilled plane castings, and their chemical composition is identified to be Al2O3. Weibull statistics analyses showed that the double oxide film defects significantly reduce mechanical properties of the castings investigated. Furthermore, the ultimate tensile strength is more obviously deteriorated by double oxide film defects than elongation.
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