Evaluation of the serviceability of products made of titanium alloys with gas-saturated layers

Fedirko, V. М.; Pichugin, A. T.; Luk’yanenko, A. G.; Siryk, Zenoviy

doi:10.1007/bf02538571

Cited by 8 publications

(3 citation statements)

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“…V. Karpenko Physicomechanical Institute of the National Academy of Sciences of Ukraine, Lvov, Ukraine (e-mail: tvs1981@list.ru) 2. The authors are grateful to A. T. Pichugin for participation in the studies.line (211) at angles 2q = 109°.…”

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confidence: 97%

Solid-Solution Hardening of the Surface Layer of Titanium Alloys. Part 2. Effect on Metallophysical Properties

2015

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confidence: 97%

Solid-Solution Hardening of the Surface Layer of Titanium Alloys. Part 2. Effect on Metallophysical Properties

2015

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“…It allows to reveal the influence of level and depth of surface hardening and also determine the optimal combination of these parameters. To form the hardened layers with various ratios K and l, the determined relations considering the influence of temperature-time and gas-dynamical parameters of rarefied gas medium containing oxygen on the parameters of hardened layers and peculiarities of solid solution surface hardening of titanium alloys of various structural classes were used [7][8][9][10][11][12]. The used approaches for selection of parameters of thermodiffusion saturation under specified K and l are demonstrated in Figure 14 for alloy VT1-0 as an example.…”

Section: Relationship Between the Treatment Parameters (Pressure Temperature Duration) And Level Of Interstitial Solidmentioning

confidence: 99%

Surface Treatment of Titanium Alloys in Oxygen-Containing Gaseous Medium

Trush¹,

Fedirko²,

Luk’yanenko³

2019

Titanium Alloys - Novel Aspects of Their Processing [Working Title]

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The aim of investigations on the chapter was to determine regularities of solid solution hardening of surface layers of titanium alloys depending on the conditions of thermodiffusion saturation in rarified gas medium containing oxygen and determine the correlations between parameters of surface-hardened layers (surface hardness, depth of hardened zone, microstructure) and fatigue properties of titanium alloys under various methods of surface hardening. To achieve the formulated aim, the following methods were used: (a) thermodiffusion saturation of titanium alloys in rarified gas medium containing oxygen in the wide range of temperature-time and gas-dynamical parameters and (b) surface deformation by ultrasonic shock and shot-blasting treatments with rapid annealing of deformed surface by means of induction heating. The positive influence of surface hardening on the fatigue characteristics is decreased under the increasing of l when K is constant. The highest relative gain of fatigue strength (Δσ À1 ) of samples with CTT surface-hardened layers is marked for the low-and middle-strong alloys VT1-0 and OT4-1. Thus for alloy VT1-0, Δσ À1 = 35% under relative gain of surface hardness K = 70% and l = 3 0 μm. For the near-α-alloy OT4-1, Δσ À1 = 38% under relative gain of surface hardness K = 35% and l = 4 5 …50 μm.

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“…The concept has been used to develop a method of thermochemical treatment (TCT) for raising the fatigue resistance of thin-wall (£ 4 mm) articles from titanium alpha-and pseudo-alpha-alloys by solid-solution hardening of their surface layer in a controlled rarefied oxygen-containing gas atmosphere [2]. The method is based on the earlier determined data reflecting increase in the fatigue value of titanium alloys [3] at a specific proportion of parameters, namely, the surface relative hardening K and the thickness l of the hardened zone of the surface layer formed by diffusion saturation with interstitial impurities from a controlled gas environment. Parameter K is determined by the equation .…”

Section: Introductionmentioning

confidence: 99%

Solid-Solution Hardening of the Surface Layer of Titanium Alloys. Part 1. Effect on Mechanical Properties

2014

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The effect of solid-solution hardening of the surface layer of the metal due to diffusion saturation with interstitial impurities (oxygen) on the properties of titanium alpha and pseudo-alpha alloys is studied under various kinds of loading (low-cycle pure bending, rotational bending, cyclic tension, and tension under static load). Optimum levels of solid-solution hardening of the surface layer are determined.

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Evaluation of the serviceability of products made of titanium alloys with gas-saturated layers

Cited by 8 publications

References 1 publication

Solid-Solution Hardening of the Surface Layer of Titanium Alloys. Part 2. Effect on Metallophysical Properties

Solid-Solution Hardening of the Surface Layer of Titanium Alloys. Part 2. Effect on Metallophysical Properties

Surface Treatment of Titanium Alloys in Oxygen-Containing Gaseous Medium

Solid-Solution Hardening of the Surface Layer of Titanium Alloys. Part 1. Effect on Mechanical Properties

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