A preparation method of titanium/aluminum bimetallic composite material with curved surface self-forming characteristics

A composite material and forming feature technology, which is applied in the field of titanium/aluminum bimetallic composite materials and preparation, can solve the problems of increasing the difficulty of secondary machining, and achieve the effects of avoiding secondary machining, simple process, and good mechanical properties
CN113022045BActive Publication Date: 2022-05-24CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2022-05-24

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Abstract

The invention relates to a titanium / aluminum bimetallic composite material with curved surface self-forming characteristics and a preparation method thereof. The difference in physical properties between materials (that is, the significant difference in linear expansion coefficient), the bending internal stress is formed during the cooling process of titanium / aluminum after thermal field recombination, which induces its spontaneous formation of structural characteristics that bend toward the aluminum side, avoiding the Secondary processing of thin sheets. The bending degree of the titanium / aluminum bimetallic composite is controlled by adjusting the dimensions of the titanium and aluminum substrates (length×width×thickness). The invention provides a new idea for designing and manufacturing thin plate-like heterogeneous composite materials with curved surface structure features.
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Description

Technical field

[0001] The present invention relates to a bimetallic sheet having curved features, specifically to a surface self-forming feature of titanium / aluminum bimetallic composite material and preparation method. Background

[0002] Titanium and aluminum are typical lightweight metals with wide applications in the aerospace field, and the effective combination of two heterogeneous materials to form titanium / aluminum composite materials can achieve a good balance in the specific strength, structural weight, fatigue performance and economy of the material, which is an advantage that a single metal cannot match. However, current titanium / aluminum composite preparation techniques inevitably generate Ti at the Ti / Al heterogeneous interface 3 Al、TiAl、TiAl 3 and a series of hard and brittle intermetallic compounds. These intermediate phases tend to become crack sources during subsequent deformation processing, increasing the difficulty of secondary machining. For titanium / alum...

Claims

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