Linear friction welding of equiaxed Ti17 titanium alloy: Effects of microstructure evolution on tensile and impact properties

被引：9

作者：

Guo, Zhenguo ^{[1
]}

Ma, Tiejun ^{[1
]}

Chen, Tao ^{[2
]}

Wang, Jiantao ^{[2
]}

Chen, Xi ^{[1
]}

Yang, Xiawei ^{[1
]}

Tao, Jun ^{[3
]}

Li, Ju ^{[3
]}

Li, Wenya ^{[1
]}

Vairis, Achilles ^{[1
,4
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Shaanxi Key Lab Frict Welding Technol, Xian 710072, Shaanxi, Peoples R China

[2] China Aviat Power Co Ltd, Aero Engine Corp, Xian 710015, Shaanxi, Peoples R China

[3] AVIC Mfg Technol Inst, Aeronaut Key Lab Welding & Joining Technol, Beijing 100024, Peoples R China

[4] Univ West Attica, Mech Engn Dept, Athens 12241, Greece

来源：

JOURNAL OF MATERIALS SCIENCE | 2023年 / 58卷 / 24期

基金：

中国国家自然科学基金;

关键词：

MECHANICAL-PROPERTIES; TI-5AL-2SN-2ZR-4MO-4CR TI17; PHASE-TRANSFORMATIONS; TEXTURE DEVELOPMENT; RESIDUAL-STRESSES; HEAT-TREATMENT; WELDED-JOINTS; DEFORMATION; PARAMETERS;

D O I：

10.1007/s10853-023-08666-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Linear friction welding of equiaxed Ti17 titanium alloy with great strengthplasticity matching was carried out in this study and the microstructure evolution, tensile property and impact toughness of this joint were investigated in detail. Results show that a dissolution (alpha metastable beta transformation) takes place in both thermo-mechanically affected zone (TMAZ) and weld zone (WZ). The metastable beta in TMAZ near base metal (BM) is affected by stress during welding, resulting in concentrated orientation and high dislocation density. Dynamic recrystallizations of a and metastable beta phases occur in TMAZ near WZ, leading to fine recrystallized a grains and equiaxed recrystallized beta grains. Complete a dissolution and total dynamic recrystallization appear in WZ owing to the effect of strong thermomechanical coupling. Above microstructure evolution causes significant work hardening and fine grain strengthening effects, counteracting the weakening effect induced by a dissolution, and resulting in the tensile strength (1250.0 MPa), elongation (12.2%) and impact toughness (28.8 J/cm(2)) of the joint are higher than those of the BM. In addition, the tensile strength and elongation of the equiaxed Ti17 joint are increased compared to those of bimodal as well as basketweave Ti17 joints.

引用

页码：10189 / 10200

页数：12

共 39 条

[1] Texture development during the torsion testing of alpha-iron and two IF steels [J].