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Forming magnesium alloys with improved ductility

A magnesium alloy, ductility technology, applied in the field of magnesium alloy composition, can solve the problems of limited investment and lack of knowledge

Inactive Publication Date: 2010-08-18
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, knowledge in this area is lacking due to limited investment in identifying alloying additions that can advantageously manipulate room temperature formability of wrought magnesium materials.

Method used

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  • Forming magnesium alloys with improved ductility
  • Forming magnesium alloys with improved ductility
  • Forming magnesium alloys with improved ductility

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Embodiment Construction

[0017] The following description of the embodiment(s) is merely exemplary in nature and is not intended to limit the claimed invention, its application, or its uses.

[0018] Magnesium alloys comprising primarily magnesium with minor additions of cerium can be formed by a hot deformation process into wrought articles exhibiting improved room temperature ductility. Here, room temperature means a typical indoor ambient temperature, such as about fifteen to about thirty degrees Celsius. The forged product may be in a final product shape. However, the room temperature ductility of the forged article makes it useful for further deformation into desired different shapes. The unexpected ductility of the hot-deformed magnesium body is attributed to its cerium content and hot-deformation process, which contributes to the transformation of slip distribution, reduction of yield strength, increase of work hardening , a reduction in grain size and a recrystallized texture that favors bas...

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Abstract

A magnesium alloy comprising up to about one weight percent of cerium may be hot worked to produce an intermediate or final alloy workpiec that exhibits enhanced ductility at room temperature. The addition of a small amount of cerium may affect the magnesium alloy by reducing yield strength, refining grain size, and improving the work hardening behavior. Recrystallization during hot deformation of the rare earth containing magnesium material alters the texture of the alloy and orients the grains in a manner that favors basal slip activity. The alloy thus deforms at room temperature by a combination of twinning and slip mechanisms.

Description

technical field [0001] The present invention generally relates to worked magnesium alloy compositions exhibiting improved ductility at room temperature. More specifically, an alloy of magnesium and cerium is subjected to high temperature deformation to improve the formability of the alloy at room temperature. Background technique [0002] Magnesium is the lightest structural metal. In engineering applications it is alloyed with one or more elements such as aluminum, manganese, rare earth metals, lithium, zinc and silver. Magnesium typically comprises eighty-five percent or more by weight of these alloys. [0003] The cost of magnesium has decreased significantly in recent years, and magnesium and its alloys have become attractive for a wide range of applications, in part because of their desirable physical properties such as light weight, high specific strength and stiffness, machinability, and ability to be easily recycled. structural materials. However, the use of magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C23/06B21C23/00
CPCB21C23/002C22C1/002B21C29/00C22C23/06C22F1/06C22C23/00C22C1/11
Inventor A·K·古普塔A·M·库马P·拉马劳A·K·萨奇德夫A·A·罗P·K·米什拉
Owner GM GLOBAL TECH OPERATIONS LLC