Simultaneously achieving exceptional and heat treatment insensitive strength-ductility synergy in an α plus β titanium alloy via tailoring silicide and heterogeneous α precipitates

被引:0
作者
Dai, Jinhua [1 ]
Tang, Bin [1 ,2 ]
Wang, Chuanyun [1 ]
Fan, Yurong [1 ]
Wei, Beibei [1 ]
Wu, Jiaqi [1 ]
Wang, Yilei [1 ]
Chen, Xiaofei [1 ]
Zhang, Xiang [1 ]
Han, Yiheng [1 ]
Chen, Wentao [1 ]
Li, Jinshan [1 ,2 ]
Zhang, Pingxiang [1 ,3 ]
机构
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[2] Northwestern Polytech Univ, Chongqing Innovat Ctr, Chongqing 401135, Peoples R China
[3] Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R China
来源
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2025年 / 236卷
基金
中国国家自然科学基金;
关键词
Titanium alloy; Silicide; Microstructure; Strengthening mechanism; Ductility; Heat treatment sensitivity; MICROSTRUCTURE; PHASE; SLIP; DEFORMATION; MECHANISMS;
D O I
10.1016/j.jmst.2025.01.072
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The development of cost-effective titanium alloys with outstanding mechanical properties has always been a primary concern of the modern aerospace industry. However, the intrinsic sensitivity of their alpha precipitates to heat treatments proliferates the manufacturing costs to achieve desirable strength and ductility, especially in engineering occasions. In current work, a silicide-containing alpha+beta Ti-5Al-7.5V-0.5Mo-0.5Zr-0.5Si (TC5751S) alloy has been evidenced to exhibit advanced mechanical properties with reduced sensitivity to heat treatments. It is noted that more nano-scale secondary alpha (alpha s) precipitate with a simultaneous dissolution in micron-scale primary alpha (alpha p) and (Ti, Zr)5Si3 silicides in the current alloy as the solution temperature increases. However, this alloy shows excellent and stabilized strength-ductility synergy in all cases (ultimate tensile strength: 1335 +/- 30 MPa, yield strength: 1245 +/- 30 MPa, fracture strain: 9.6 % +/- 0.5 %) irrespective of the aforementioned variations in the microstructure. This stabilized strength and ductility of TC5751S are rationalized based on the compensation mechanisms between the contributions from silicide and heterogeneous alpha precipitates. The quantitative analysis unveils that the increased alpha s/ beta phase boundary strengthening (sigma PB) is approximately offset by the decrease in silicide strengthening (sigma silicide) due to silicide dissolution with increasing solution temperatures, leading to the strength of TC5751S in a dynamic equilibrium state. Simultaneously, the dissolution of silicides reduces the cracking tendency and complements the ductility loss due to alpha p reduction and alpha s precipitation, leading to the ductility insensitive to heat treatments. Therefore, the compensating role of silicides to the effects of heterogeneous alpha precipitates on both the strength and ductility of titanium alloys has been well-verified in our work, providing a novel pathway to the development of high-performance titanium alloys friendly to processing strategies. (c) 2025 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码:51 / 66
页数:16
相关论文
共 50 条
[31]   Achieving exceptional strength-ductility synergy in the GH4698 nickel-based superalloy via heterogeneous grains and L12-γ′ nanoprecipitates with bimodal size distribution [J].
Yang, Jianbing ;
Liu, Fei ;
Chen, Guidong ;
Tan, Yuanbiao ;
Ji, Xuanming ;
Wei, Siyuan ;
Wei, Boxin ;
Chen, Junyu ;
Ramamurty, Upadrasta ;
Xiang, Song .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2025, 938
[32]   Heterostructured titanium composites with superior strength-ductility synergy via controllable bimodal grains and <c plus a> dislocation activity [J].
Chen, Jiajing ;
Han, Yuanfei ;
Wei, Zichao ;
Li, Shaopeng ;
Sun, Zhonggang ;
Zhang, Liang ;
Huang, Guangfa ;
Le, Jianwen ;
Zhang, Di ;
Lu, Weijie .
MATERIALS RESEARCH LETTERS, 2023, 11 (10) :863-871
[33]   Exceptional cryogenic strength-ductility synergy in Al0.3CoCrNi medium-entropy alloy through heterogeneous grain structure and nano-scale precipitates [J].
Sathiyamoorthi, Praveen ;
Asghari-Rad, Peyman ;
Park, Jeong Min ;
Moon, Jongun ;
Bae, Jae Wung ;
Zargaran, Alireza ;
Kim, Hyoung Seop .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2019, 766
[34]   Dual precipitates and heterogeneous fine-grain structure induced strength-ductility synergy in a CoCrNi-based medium-entropy alloy [J].
Chen, Yongan ;
Li, Dazhao ;
Xie, Ruofei ;
Lu, Haitao .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2023, 867
[35]   Achieving exceptional strength-ductility combination in a novel L12 nanoparticles-strengthened high-entropy alloy via conventional casting [J].
Liu, Xiangkui ;
Feng, Shuai ;
Xu, Huiqing ;
Liu, Conghao ;
Zhang, Wei ;
Zhu, Hongyu ;
Wei, Wei ;
Kong, Jian .
INTERMETALLICS, 2024, 165
[36]   Achieving high strength and ductility of a metastable β-titanium alloy via coupling thermomechanical processing and heat treatments [J].
Liu, Leliang ;
Huang, Mingda ;
Geng, Donghui ;
Liu, Jixiong ;
Wang, Xiaoxiang ;
Sun, Qiaoyan ;
Sun, Jun .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2024, 891
[37]   Achieving an appropriate strength-ductility synergy of Nbss/Nb5Si3 in situ composites governed by gradient annealing heat treatment [J].
Wang, Yu ;
Jia, Lina ;
Ye, Chengtong ;
Zhang, Hu .
MATERIALS CHARACTERIZATION, 2022, 193
[38]   Excellent strength-ductility synergy and corrosion resistance in a metastable high entropy alloy via heterogeneous structure design [J].
Lu, Kejie ;
Li, Jiahao ;
Wang, Youfan ;
Ma, Xinkai .
JOURNAL OF ALLOYS AND COMPOUNDS, 2023, 941
[39]   Achieving exceptional strength-ductility synergy of laser direct energy deposited AA7075 alloy by subsequent friction stir processing [J].
Lv, Jiming ;
Lu, Haifei ;
Zhang, Hongmei ;
Sun, Zhonggang ;
Luo, Kaiyu ;
Lu, Jinzhong .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2025, 923
[40]   Sustaining an excellent strength-ductility combination of a PM α plus β titanium alloy with fine prior β grains and heterogeneous microstructure [J].
Zhang, Bowen ;
Liu, Zhujun ;
Wu, Xiaogang ;
Zhang, Deliang .
JOURNAL OF ALLOYS AND COMPOUNDS, 2022, 926