Effect of low temperature thermo-mechanical treatment on microstructures and mechanical properties of TC4 alloy

被引：0

作者：

孙利平 ^{[1
]}

林高用 ^{[1
,2
]}

刘健 ^{[1
]}

曾菊花 ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Central South University

[2] Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University

来源：

JournalofCentralSouthUniversityofTechnology | 2010年 / 17卷 / 03期

关键词：

Ti-6Al-4V (TC4) alloy; low temperature thermo-mechanical treatment; microstructure; mechanical properties; strain strengthening;

D O I：

暂无

中图分类号：

TG146.23 [];

学科分类号：

080502 ;

摘要：

The effects of low temperature thermo-mechanical treatment (LTTMT) on microstructures and mechanical properties of Ti-6Al-4V (TC4) alloy were studied by optical microscopy (OM), tensile test, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The experimental results confirm that the strength of TC4 alloy can be improved obviously by LTTMT processing, which combines strain strengthening with aging strengthening. The effect of LTTMT on the alloy depends on the microstructure of the refined and dispersed α+β phase on the basis of high dislocation density by pre-deformation below recrystallization temperature. The tensile strength decreases with the increase of pre-deformation reduction. The optimal processing parameters of LTTMT for TC4 alloy are as follows: solution treatment at 900 ℃ for 15 min, pre-deformation in the range of 600-700 ℃ with a reduction of 35%, finally aging at 540 ℃ for 4 h followed by air-cooling.

引用

页码：443 / 448

页数：6

共 7 条

[1]

Numerical simulation on forging process of TC4 alloy mounting parts[J]. 吕成,张立文.Transactions of Nonferrous Metals Society of China. 2006(06)

[2] Dry sliding wear behavior of Ti-6Al-4V alloy in air [J].

刘勇 ;

杨德庄 ;

武万良 ;

杨士勤 .

Journal of Harbin Institute of Technology, 2002, (01) :67-71

[3] DEVELOPMENT OF CONSTITUTE EQUATIONS FOR Ti-6Al-4V ALLOY UNDER HOT-WORKING CONDITION [J].

L X Li and D S Peng Department of Materials Science and Engineering Central SouthUniversity of Technology Changsha China .

Acta Metallurgica Sinica(English Letters), 2000, (01) :263-269

[4] 高温形变热处理对TC4钛合金组织与性能的影响 [J].

黄辉 .

光学精密工程, 1996, (04) :48-52

[5]

Microstructure developed in the surface layer of Ti-6Al-4V alloy after sliding wear in vacuum[J] . Y. Liu,D.Z. Yang,S.Y. He,W.L. Wu.Materials Characterization . 2003 (4)

[6]

An investigation of short fatigue crack growth in Ti–6Al–4V with colony microstructures[J] . S Shademan,W.O Soboyejo.Materials Science ＆ Engineering A . 2002 (1)

[7]

Development of the microstructure and fatigue strength of two phase titanium alloys in the processes of forging and heat treatment[J] . K Kubiak,J Sieniawski.Journal of Materials Processing Tech. . 1998 (1)

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