Journal ArticleDOI
High-strength titanium alloys for aerospace engineering applications: A review on melting-forging process
Qian Zhao,Qiaoyan Sun,Shewei Xin,Yongnan Chen,Cong Wu,Huan Wang,Jianwei Xu,Mingpan Wan,Weidong Zeng,Yongqing Zhao +9 more
TLDR
A comprehensive overview of the research status, processing and heat treatment technologies, phase transformation, processing-microstructure-property correlation and strengthening-toughening mechanism of HS-TAs for aerospace engineering applications manufactured via melting-forging process is provided in this article .Abstract:
As a crucial branch for titanium industry, high-strength titanium alloys (HS-TAs, with UTS ≥ 1100 MPa) are indispensable structural materials for advanced engineering applications such as aerospace and marine fields. Along with the expansion of HS-TAs’ market, achieving satisfying synergies of high strength, high ductility (elongation ≥ 6%) and high toughness (KIC ≥ 50 MPa⋅m1/2) has been identified as the uppermost technical bottleneck for their research and development. To overcome the challenge, two primary strategies have been initiated by the titanium community, developing novel alloys and innovating processing technologies. For the former, a dozen of newly-developed alloys were reported to exhibit excellent strength-ductility-toughness combinations, including Ti-5553, BT22, TC21 and Ti-1300, for which the ideal mechanical performances were based on specific microstructures realized by low impurity rate (e.g. oxygen content ≤ 0.15 wt%), complicated processing and complex heat treatment. For the latter, several innovatory forging and heat treatment technologies were originated for the mature alloys to optimize their balanced property by extraordinary microstructural characteristics. In this review, we provide a comprehensive overview over the research status, processing and heat treatment technologies, phase transformation, processing-microstructure-property correlation and strengthening-toughening mechanism of HS-TAs for aerospace engineering applications manufactured via melting-forging process. Finally, the prospects and recommendations for further investigation and development are proposed based on this review. read more
Citations
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Growth mechanism of αp and interface relationships between αp and αs during cooling of a near α titanium alloy
TL;DR: In this article , the authors focused on the interface relationship between primary α (αp) and the precipitation secondary α(αs) phase at different cooling rates from 965 °C.
Journal ArticleDOI
Tribological Properties of Ti6Al4V Titanium Textured Surfaces Created by Laser: Effect of Dimple Density
TL;DR: In this article , the effect of laser texturing on the tribological properties of Ti6Al4V in contact with a ceramic ball was investigated using a ball-on-flat reciprocating tribometer under lubricated conditions.
Journal ArticleDOI
Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compression
TL;DR: In this paper , a novel metastable β titanium alloy Ti-6Mo-3.5Cr-1Zr is developed by controlling the phase stability, which exhibits a compressive strength of ∼ 1152 MPa with large malleability during dynamic compressions.
Journal ArticleDOI
Oxidation kinetics and microstructure evolution of air oxidation behavior of TC18 alloy
Aiying Xi,Longchao Zhuo,Hui-Qing Shao,Di Shan,Feng Sun,Jinwen Lu,Kaile Ji,Bingqing Chen,Xiaohua Zhao,Kaixuan Wang +9 more
TL;DR: In this article , the high-temperature air oxidation behaviors at 600 °C, 700 °C and 800 °C of the TC18 alloy were systematically studied and the results revealed that the oxidation behavior of TC18 Alloy followed a linear-parabolic law at 600°C and 700°C while being governed by a simple linear law at 800°C.
Journal ArticleDOI
Understanding processing map and microstructural evolution of powder metallurgy Ti-6Al-4V within a wide range of deformation temperatures
TL;DR: In this paper , the authors investigated the hot deformation behavior and microstructural evolution of powder metallurgy (PM) Ti-6Al-4V using the Arrhenius constitutive model, hot processing map, microstructure observation, and hot Deformation mechanism analysis.
References
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