Hot Processing of Cast and PM Ti-6Al-4V Alloy

Wojtaszek, M.; Śleboda, Tomasz; Korpała, Grzegorz

doi:10.1515/amm-2016-0187

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…The hot compression process was scheduled according to the scheme presented in figure 4a. The results of the discussed flow behavior of the examined alloys were previously reported by Wojtaszek andŚleboda (2013, 2014), Wojtaszek et al (2014, 2016), and Zyguła et al (2017. Tests were performed using different types of thermo-mechanical simulators, which were able to simulate various ranges of processing conditions.…”

Section: Flow Behaviorsupporting

confidence: 81%

“…For the numerical analysis of forging selected structural part out of the investigated alloys, commercial QForm 3D software was used. The results of the numerical modeling of the hot forging of PM titanium alloys as well as its verification in industrial conditions were previously reported by Wojtaszek andŚleboda (2013, 2014), Wojtaszek et al (2014Wojtaszek et al ( , 2016, Wojtaszek (2018). In order to properly design and -127 -COMPUTER METHODS IN…”

Section: Fem Simulations and Process Verification In Industrial Conditionsmentioning

confidence: 89%

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Selected aspects of manufacturing structural elements from titanium alloys combining cost-effective powder metallurgy technology and metal forming processes

Zyguła¹,

Wojtaszek²,

Śleboda³

et al. 2019

cmms

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Titanium alloys are mainly used in the automotive, aviation, shipbuilding and military industries. Their main advantages are low specific gravity, resistance to cracking and corrosion, high strength as well as fatigue strength. The most important disadvantages of titanium alloys include low thermal conductivity, difficulties in their machining and high cost of manufacturing. For the latter reason, titanium alloys are primarily used for the manufacturing of highly responsible components, such as implants and aviation structures, while the remaining products are produced in limited series. In the appropriate conditions, many titanium alloys can be formed in hot working processes. At present, in the processes of manufacturing structural elements of titanium alloys, semi-finished products obtained by the casting method are commonly used. However, more and more research is being carried out on the use of powder metallurgy based material in this field. This approach opens up the possibility of decreasing production costs. As initial material, the alloy powders or mixtures of elemental powders can be used. The properties of alloy powder products are usually high and stable, however, the cost of powder production is high. Obtaining a product from titanium alloys based on a powders mixture is relatively simple and significantly cheaper. The disproportion of prices causes, that a great number of research projects realized in recent years in the field of implementation of powder metallurgy for manufacturing titanium-based products is directed towards the use of powder mixtures since this approach gives real chances for the successful implementation of costeffective titanium alloys processing technology.

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Section: Flow Behaviorsupporting

confidence: 81%

Section: Fem Simulations and Process Verification In Industrial Conditionsmentioning

confidence: 89%

Selected aspects of manufacturing structural elements from titanium alloys combining cost-effective powder metallurgy technology and metal forming processes

Zyguła¹,

Wojtaszek²,

Śleboda³

et al. 2019

cmms

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show abstract

“…When producing high-loaded details, one of the problems is the presence of surface tensile stresses (Gnyusov et al, 2017;Hou et al, 2018). They can substantially reduce the mechanical, resource, and fatigue characteristics of products (Wojtaszek et al, 2016;Sakhvadze et al, 2017;Pei & Duan, 2017;Huang et al, 2018). The residual stresses exist in products in the absence of external actions.…”

Section: Introductionmentioning

confidence: 99%

Methods for Hardening and Improvement of Fatigue Characteristics of Titanium and Iron-Chromium Nickel Alloy Samples

Скворцов¹,

Gnatyuk²,

Rybakova³

et al. 2020

PTQ

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This work describes the procedure for determining residual surface stresses using the mechanical method and four methods of hardening samples. The urgency of the problem stated in the article is due to the fact that surface tensile stresses arising in the manufacture of highly loaded parts can significantly reduce the mechanical, resource and fatigue characteristics of products. The aim of the study was to harden samples of titanium and iron-chromium-nickel alloys to improve their strength, fatigue and resource characteristics and determine residual stresses by layer-by-layer removal of the studied layers by electrochemical etching. The determination of surface residual stresses was carried out mechanically using a measuring and calculation complex during continuous etching of the metal from the test surface of the sample, which made it possible to measure the residual stresses at different depths and determine the energy of the surface stress state. Residual stresses were calculated from the deformation of the remaining part of the sample with a change in the depth of the studied layers. The hardening of the samples was carried out in four ways, namely: ultrasonic hardening; ultrasonic curing + Rosler (vibration processing); Rosler (vibration processing) + ultrasonic curing; Rosler (vibration processing) + ultrasonic hardening. The results of the study showed that the surface of the products is a weaker area than the inside. After quenching, surface compressive stresses arise for all samples of titanium and iron-chromium-nickel alloys. The preferred case of hardening is the second (ultrasonic hardening + centrifugal hardening). The presence of residual compressive stresses in the outer layers of the products increases their fatigue limit by ≈20%. The results of the work can be used to manufacture products with high mechanical, resource and fatigue characteristics.

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Hot Processing of Cast and PM Ti-6Al-4V Alloy

Cited by 2 publications

References 14 publications

Selected aspects of manufacturing structural elements from titanium alloys combining cost-effective powder metallurgy technology and metal forming processes

Selected aspects of manufacturing structural elements from titanium alloys combining cost-effective powder metallurgy technology and metal forming processes

Methods for Hardening and Improvement of Fatigue Characteristics of Titanium and Iron-Chromium Nickel Alloy Samples

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