Al-Mg based alloy sheets with good press formability

US6221182A · kind A · utility

Assignees

• ALCOA INC. · US
• KOBE STEEL LTD. · JP

Inventors

• Frederic Barlat · Export, US
• John C. Brem · New Kensington, US
• Shigeo Hattori · Funabashi, JP
• Yasuhiro Hayashida · Kasai, JP
• Daniel J. Lege · Vandergrift, US
• Yasushi Maeda · Kasai, JP
• Kuniaki Matsui · Sakai, JP
• Shawn J. Murtha · Monroeville, US
• Masahiro Yanagawa · Kasai, JP
• Kwansoo Chung · Seoul, KR
• Narikazu Hashimoto · Tokyo, JP

Key dates

• Filing date: Jul 19, 2000
• Grant date: Apr 24, 2001
• Expiry date: Jul 19, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C21/06
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

By careful control of composition and processing, Al--Mg based alloy sheets with preferred grain sizes and crystallographic textures that result in good press formability are disclosed. The Al--Mg alloy preferably contains 2-6 wt % Mg, and at least 0.03 wt % of at least one element selected from Fe, Mn, Cr, Zr, and Cu. The crystallographic texture is comprised of grains with a volume fraction in a range of about 30-50% in the CUBE orientation {100}<001>, and a volume fraction in a range of about 10 to 20% in the BRASS orientation {110}<112>, wherein the grain size is within a range of about 50 to 100 .mu.m.