scholarly journals Structure and properties of fully-penetrated metal of two-phase titanium alloy with dispersion hardening at AAW

2016 ◽  
Vol 2016 (11) ◽  
pp. 11-19
Author(s):  
G.M. Grigorenko ◽  
◽  
S.V. Akhonin ◽  
O.M. Zadorozhnyuk ◽  
I.N. Klochkov ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Dispersion Hardening ◽  
Structure And Properties ◽  
Two Phase

scholarly journals Structure and properties of fully-penetrated metal of two-phase titanium alloy with dispersion hardening at AAW

2016 ◽  
Vol 2016 (11) ◽  
pp. 9-16
Author(s):  
G.M. Grigorenko ◽  
◽  
S.V. Akhonin ◽  
O.M. Zadorozhnyuk ◽  
I.N. Klochkov ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Dispersion Hardening ◽  
Structure And Properties ◽  
Two Phase

scholarly journals Formation of Structure and Properties of Two-Phase Ti-6Al-4V Alloy during Cold Metal Transfer Additive Deposition with Interpass Forging

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4415
Author(s):  
Yuri Shchitsyn ◽  
Maksim Kartashev ◽  
Ekaterina Krivonosova ◽  
Tatyana Olshanskaya ◽  
Dmitriy Trushnikov
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Physical And Mechanical Properties ◽  
Metal Transfer ◽  
Layer By Layer ◽  
Structure And Properties ◽  
Two Phase ◽  
Cold Metal Transfer ◽  
Α Phase ◽  
Cold Metal

The paper deals with the main formation patterns of structure and properties of a titanium alloy of the Ti-6Al-4V system during additive manufacturing using cold metal transfer (CMT) wire deposition. The work aims to find the optimal conditions for layer-by-layer deposition, which provides the high physical and mechanical properties of the titanium alloy of the Ti-6Al-4V system hybrid, additively manufactured using CMT deposition. Particular attention is paid to interpass forging during the layered printing of the product. Additionally, we investigate how the heat treatment affects the structure and properties of the Ti-6Al-4V alloy that has been CMT-deposited, both with and without forging. These studies have shown that the hybrid multilayer arc deposition technology, with interpass strain hardening, allows the use of high temperature and high technology titanium alloys to obtain products of a required geometric shape. It has been proven that the interpass deformation effect during CMT deposition contributes to a significant decrease in the sizes of the primary β-grains. In addition, forging enhances the effect of microstructure refinement, which is associated with phase recrystallization in deformed areas. It is shown that the heat treatment leads not only to a change in the morphology of the phases but also to additional phase formations in the structure of the Ti-6Al-4V-deposited metal while the mechanism is realized and consists of the gradual decomposition of the martensitic α′-phase and the formation of a dispersive α2-phase. This structure formation process is accompanied by the dispersion hardening of the α-phase. The strength characteristics of the Ti-6Al-4V alloy obtained using layer-by-layer CMT with forging are given; they exceed the strength level of materials obtained with the traditional technologies of pressure treatment, and there is no decrease in plasticity characteristics. The use of the subsequent heat treatment makes it possible to increase the ductility characteristics of the deposited and forged Ti-6Al-4V material by 1.5–2 times without strength loss.

Effect of Heat Treatment Temperature-Rate Parameters on Structure and Complex of Physical-Mechanical Properties in VST5553 Titanium Alloy Rod Semi-Finished Goods

2017 ◽  
Vol 265 ◽  
pp. 785-788
Author(s):  
A.V. Zhelnina ◽  
A.G. Illarionov ◽  
M.S. Kalienko
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Cooling Rate ◽  
High Strength ◽  
Phase Region ◽  
Treatment Temperature ◽  
Structure And Properties ◽  
Heavy Duty ◽  
Two Phase ◽  
Temperature Rate

VST5553 titanium alloy is high strength (α + β) - transition alloy which is used for the production of heavy-duty parts [1]. It is known [2], that the cooling rate changing during the heat treatment can change the phases ratio in the alloy. With regards to the VST5553 alloy, this may be due to different cooling rates over the cross section of large-sized semi-finished goods. This in turn affects a complex of properties. Thus, it is necessary to know the effect of the cooling rate of two-phase region on the structure and properties, particularly the VST5553 alloy. However, the research in this area is not sufficient enough. The present study is devoted to this issue.

scholarly journals Development of heat treatment modes for a two-phase titanium alloy to form regulated structure and properties complex

2019 ◽  
Vol 298 ◽  
pp. 00049
Author(s):  
Svetlana Skvortsova ◽  
Galina Gurtovaya ◽  
Maria Afonina ◽  
Natalya Ruchina ◽  
Gulnara Zaynetdinova
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Chemical Composition ◽  
Structure And Properties ◽  
Two Phase ◽  
Hot Rolled

The article shows the possibility of creating structure of the same type and, accordingly, a close level of properties in hot-rolled semi-finished products of the VST2K alloy with different chemical composition by means of heat treatment.

Coarsening Kinetics and Morphological Evolution in a Two-Phase Titanium Alloy During Heat Treatment

2016 ◽  
Vol 25 (3) ◽  
pp. 734-743 ◽  
Author(s):  
Jianwei Xu ◽  
Weidong Zeng ◽  
Zhiqiang Jia ◽  
Xin Sun ◽  
Yawei Zhao
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Morphological Evolution ◽  
Two Phase ◽  
Coarsening Kinetics

scholarly journals The High-Temperature Deformation Behavior of As-Cast Ti90 Titanium Alloy

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1630
Author(s):  
Ke Wang ◽  
Yongqing Zhao ◽  
Weiju Jia ◽  
Silan Li ◽  
Chengliang Mao
Keyword(s):  
Titanium Alloy ◽  
Deformation Behavior ◽  
Processing Map ◽  
Electron Backscatter Diffraction ◽  
Phase Region ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Two Phase ◽  
Temperature Range ◽  
Β Phase

Isothermal compressions of as-cast near-α Ti90 titanium alloy were carried out on a Gleeble-3800 simulator in the temperature range of 860–1040 °C and strain rates of 0.001–10 s−1. The deformation behavior of the alloy was characterized based on the analyses of flow curves, the constructions of Arrhenius constitutive equations and the processing map. The microstructure evolution of the alloy was analyzed using the optical microscopic (OM), transmission electron microscope (TEM), and electron backscatter diffraction (EBSD) techniques. The results show that the kinking and dynamic globularization of α lamellae is the dominant mechanism of flow softening in the α + β two-phase region, while the dynamic recovery (DRV) of β phase is the main softening mechanism in the β single-phase region. The dynamic globularization of α lamellae is mainly caused by the wedging of β phase into α laths and the shearing of α laths due to imposed shear strain. The activation of prismatic and pyramidal slip is found to be easier than that of basic slip during the deformation in the α + β two-phase region. In addition, the Schmid factor of equiaxial α is different from that of lamellar α, which also varies with the angle between its geometric orientation and compression direction (CD). Based on the processing map, the low η region within the temperature range of 860–918 °C with a strain rate range of 0.318–10 s−1 should be avoided to prevent the occurrence of deformation instability.

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