Selected processing for non-equilibrium light alloys and products

US6544357B1 · kind B1 · utility

Assignee

• Franz Hehmann · DE

Inventors

• Franz Hehmann · Bocholt, DE
• Michael Weidemann · Berlin, DE

Key dates

• Filing date: Jan 31, 1997
• Grant date: Apr 8, 2003
• Expiry date: Jan 31, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/85938
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A new class of light or reactive elements and monophase &agr;′-matrix magnesium- and aluminum-based alloys with superior engineering properties, for the latter being based on a homogeneous solute distribution or a corrosion-resistant and metallic shiny surface withstanding aqueous and saline environments and resulting from the control during synthesis of atomic structure over microstructure to net shape of the final product, said &agr;′-matrix being retained upon conversion into a cast or wrought form. The manufacture of the materials relies on the control of deposition temperature and in-vacuum consolidation during vapor deposition, on maximized heat transfer or casting pressure during all-liquid processing and on controlled friction and shock power during solid state alloying using a mechanical milling technique. The alloy synthesis is followed by extrusion, rolling, forging, drawing and superplastic forming for which the conditions of mechanical working, thermal exposure and time to transfer corresponding metastable &agr;′-matrix phases and microstructure into product form depend on thermal stability and transformation behavior at higher temperatures of said li…