HIGH-STRENGTH DUAL-SCALE STRUCTURE TITANIUM ALLOY, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

Title:

HIGH-STRENGTH DUAL-SCALE STRUCTURE TITANIUM ALLOY, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

Document Type and Number:

WIPO Patent Application WO/2017/076369

Kind Code:

A1

Abstract:

A high-strength dual-scale structure titanium alloy, a preparation method therefor, and an application thereof, belonging to the technical field of alloy processing. The composition system of the titanium alloy is Ti-Nb-Cu-Co-Al, the atomic percentage of the various elements being 58~70% Ti, 9~16% Nb, 4~9% Cu, 4~9% Co, and 2-8% Al. The microstructure comprises a dual-scale coexistence of micro-crystal isometric bcc β-Ti and ultra-fine crystal isometric bcc β-Ti, and a dual-scale coexistence of micro-crystal strip fcc CoTi2 and ultra-fine crystal isometric fcc CoTi2, or an ultra-fine crystal strip fcc CoTi2 twin crystal is distributed along a boundary of a dual-scale substrate, the dual-scale substrate being a nano needle-shaped martensite a' phase dispersed within micro-crystal bcc β-Ti. The mechanical properties of the titanium alloy are significantly improved, and the titanium alloy may be used in fields such as aerospace and aviation, weaponry and sports equipment.

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Inventors:

YANG CHAO (CN)
YAO YAGUANG (CN)
QU SHENGGUAN (CN)
LI XIAOQIANG (CN)
ZHANG WEIWEN (CN)
LI YUANYUAN (CN)

Application Number:

PCT/CN2016/111020

Publication Date:

May 11, 2017

Filing Date:

December 20, 2016

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Assignee:

UNIV SOUTH CHINA TECH (CN)

International Classes:

C22C14/00; C22C1/04

Foreign References:

CN105296802A	2016-02-03
CN103305722A	2013-09-18
CN101492781A	2009-07-29
US20060213592A1	2006-09-28

Other References:

LI, Y.Y. ET AL.: "Nucleation and Growth Mechanism of Crystalline Phase for Fabrication of Ultrafine-Grained Ti66Nb13Cu8Ni6. 8A16. 2 Composites by Spark Plasma Sintering and Crystallization of Amorphous Phase", MATERIALS SCIENCE AND ENGINEERING A, vol. 528, no. 1, 25 November 2010 (2010-11-25), pages 486 - 493, XP027444104, ISSN: 0921-5093, DOI: doi:10.1016/j.msea.2010.09.037

Attorney, Agent or Firm:

GUANGZHOU HUAXUE INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)

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