High-toughness ultrafine-grain composite titanium alloy and application and preparation method thereof

A composite structure and titanium alloy technology, which is applied in the field of high-strength and toughness ultra-fine grain composite structure titanium alloy and its preparation, can solve the problem that there is no research report on high-strength and tough ultra-fine grain composite structure titanium alloy, narrow composition range and limited cooling rate. and other problems, to achieve the effect of saving raw materials, simple processing and convenient operation.
CN104232995AActive Publication Date: 2014-12-24SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2014-12-24

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Abstract

The invention belongs to the technical field of alloy materials, and particularly relates to high-toughness ultrafine-grain composite titanium alloy and application and preparation method thereof. The high-toughness ultrafine-grain composite titanium alloy consists of the following elements in percentage by mass: 55-62% of Ti, 15-24% of Nb, 6-16% of Fe, 2-12% of Co and 2-6% of Al, wherein a microstructure thereof takes a body centered cubic disordered solid solution phase rich in Ti and Nb as a matrix phase and takes a second isometric crystal phase rich in Ti and Co as a reinforcing phase. The preparation method of the high-toughness ultrafine-grain composite titanium alloy comprises the following steps: mixing powder of the elementary substances according to the percentages by mass, performing ball milling at high energy to prepare amorphous alloy powder and sintering to obtain the high-toughness ultrafine-grain composite titanium alloy. The high-toughness ultrafine-grain composite titanium alloy prepared by the preparation method has the advantages of large size and good comprehensive mechanical properties, and can be applied to the field of aerospace materials.
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Description

technical field

[0001] The invention belongs to the technical field of ultrafine-grained alloy materials, and in particular relates to a high-strength and tough ultrafine-grained composite structure titanium alloy, a preparation method and application thereof. Background technique

[0002] Titanium alloy has excellent comprehensive properties such as low density, high specific strength and fracture toughness, good low temperature toughness and corrosion resistance, and has been widely used in chemical industry, shipbuilding, medical treatment, energy and other fields, but as an important engineering structure It has become an eternal goal pursued by researchers to prepare titanium alloys with higher specific strength and toughness to meet the application under harsher conditions.

[0003] At present, researchers have obtained a series of composite structure titanium alloys with nanocrystalline matrix / amorphous matrix + ductile β-Ti dendrite structure through copper mold cast...

Claims

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