Aluminum alloy sheet excellent in press-formability and shape fixability and method of production of same
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United States of America Patent
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Feb 20, 2018
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Jan 10, 2013
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Mar 21, 2012
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Abstract
An aluminum alloy sheet which has high strength enabling application to automobile body sheet and which is excellent in press-formability and shape fixability and a method of production of the same are provided. Aluminum alloy sheet having a composition of ingredients which contains Mg, Fe, and Ti, restricts the impurity Si to less than 0.20 mass %, and has a balance of Al and unavoidable impurities and a metal structure with an average grain size of less than 15 μm and having second phase particles with a circle equivalent diameter of 3 μm or more in a number of less than 300/mm2 and having a tensile strength of 240 MPa or more, a yield strength of less than 130 MPa, an elongation of 30% or more, and a plane strain fracture limit at a strain rate of 20/sec of 0.20 or more.
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