Transactions of Materials and Heat Treatment

Title：Study on test method of KIC value for high strength aluminum alloy forging

Authors： PENG Fu-hua CHEN Bo LI Fu-guo LI Jiang GU Wei

Unit： Chengdu Aircraft Industry(Group) Limited Company Northwestern Polytechnical University

KeyWords： high strength aluminum alloy forging fracture toughness value test method

ClassificationCode：TG146.21

year,vol(issue):pagenumber：2010,35(6):99-103

Abstract：

An analytical contrast was carried out on the fracture toughness test method of high strength aluminum alloy forging at home and abroad. The fracture toughness test method of oversized or ultra thickness high strength aluminum alloy was studied by adopting different technical measures and the reason which affects the result of KIC measurement was obtained. The result shows that through some technical measures, the fracture toughness of high strength aluminum alloy forging can be obtained by small scale CT standard sample. The fracture toughness value can be increased by improving the technology of material melting, forging and heat treatment. The most important thing of measuring the fracture toughness value correctly is to ensure the plane strain status of crack tip on sample and restraining the plastic deformation.

Funds：

航空基础科学基金资助项目(03H53048)

Reference：

［1］GB/T4161-2007.金属材料平面应变断裂韧度KIC试验方法[S].
［2］王洪山.实用断裂试验方法的意义与风容(二)[J].理化检验，1996,35(6):260-262.
［3］潘志军,黎文献.高强铝合金断裂韧性的研究现状及展望[J]. 材料导报，2002,16(7):14-17.
［4］沈君.高强铝合金预拉伸板的断裂韧性研究[J].轻合金加工技术，2008,36(9):46-50.
［5］Zhou Li.A new technique for determining fracture toughness KIC and its confidence with single DCB specimen[J]. Engineering Fracture Mechanics, 1996,55(1):133-137.
［6］Kim Wallin. Statistical re-evaluation of the ASME KIC and KIR fracture toughness reference curves[J].Nuclear Engineering and Design,1999,193:317-326.
［7］王峰会,何泽夏.脆性材料断裂韧性测试及表观断裂韧性的估算[J].稀有金属材料与工程，1999，28(6)：406-409.
［8］陈康华,齐雄伟.含两种尺度微裂纹的高强铝合金的断裂韧性模型[J].中国有色金属学报，2006,16(10):1678-1683.
［9］ASTM E399-09.Standard test method for linear-elastic plane-strain fracture toughness KIC of metallic materials[S].
［10］ASTM B646-06.Standard practice for fracture toughness testing of aluminum alloys[S].
［11］ASTM E1820-08a.Standard test method for measurement of fracture toughness[S].

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