History of wrought aluminum alloys for transportations
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Accession number;06A0019800
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| Title;History of wrought aluminum alloys for transportations |
| Author;
YOSHIDA HIDEO
(Sumitomo Light Metal Industries, Ltd., Ltd., JPN)
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Journal Title;Sumitomo Light Metal Technical Reports
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Journal Code:G0321A
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ISSN:0039-4963
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VOL.46;NO.1;PAGE.99-116(2005)
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| Figure&Table&Reference;FIG.28, TBL.4, REF.88 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The development of wrought aluminum alloys in Japan about transportations, mainly, airplanes, railway cars, motor cycles and automobiles are summarized. In airplanes, especially fighters before World War II, higher strength aluminum alloys were required to compete with European or American fighters. ESD (Extra Super Duralumin), which strength was higher than duralumin or super duralumin, was invented and applied to Zero Fighter. This alloy was modified as 7075 in USA during WW II. After WW II, taper rolled stringers using 7075 alloy sheet which grains did not grow after small rolling reduction followed by solution heat treatment or superplastic 7475 alloy sheet with fine grains of 10 micron meter in diameter were developed and applied to commercial airplanes, B767 and B777. These inventions were achieved by the investigations of thermo-mechanical treatment to control grain size and grain boundaries. Recently, the applications of Al-Mg-Si-Cu alloy hollowed extrusions with high strength compared with 2024-T3 or friction stir welding of 7075 have been examined to save the cost and weight. In railway cars, JIS 7N01 weldable alloy with low quench sensitivity and high extrudability was developed. Further 7003 alloy with higher extrudability than 7N01 was invented and applied to large and wide extrusions of Shinkansen Series 200. Alloy 6N01, which can be extruded to hollow cross-section shapes with thin thickness was developed and applied to Shinkansen, Series 300 and 700. Recently honeycomb structure or FSW technology were applied to new railway cars. In motor cycles, especially, motocrossers, high strength and high stiffness wrought aluminum alloys were required to their frames, swing arms, front forks and rims. High strength aluminum alloys with tensile strength, more than 600MPa have been developed in an outer tube of front forks. In automobiles, aluminum body panels for hood have increased for twenty years.... (author abst.) |
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