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

Fedirko, V. М.; Luk’yanenko, A. G.; Trush, V. S.

doi:10.1007/s11041-014-9764-3

Cited by 14 publications

(4 citation statements)

References 1 publication

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“…That is, as a result of the formation of the surface compound layer (Figure 6), which has high surface hardness (Figure 3a) and chemical inertness [27,56], the effect of the so-called 'cold micro welding' does not occur, which is typical for adhesive wear, but is instead levelled. The formation of a diffusion zone due to solid solution hardening of the subsurface layer [57,58] significantly reduces the probability of the formation of subsurface micro-cracks in pores (Figure 11c) and delamination in subsurface layers (Figures 9 and 11c), which is typical for the fatigue mechanism.…”

Section: Discussionmentioning

confidence: 99%

Improving Wear Resistance of Highly Porous Titanium by Surface Engineering Methods

Lavrys,

Pohrelyuk,

Padgurskas

et al. 2023

Coatings

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The wear resistance of highly porous titanium in the tribo-pair with bronze under boundary lubrication condition was investigated. According to analyses of worn surfaces of highly porous titanium, it was shown that the main reason of poor wear resistance were subsurface pores that led to nucleation of micro-cracks in the subsurface layer and thereby intensified fatigue (delamination) wear. For improvement of wear resistance of highly porous titanium, the surface engineering methods, such as deformation (ball burnishing, BB), diffusion (gas nitriding, GN), and their combination—deformation–diffusion treatment (DDT), were considered. It was shown that surface hardening of highly porous titanium by BB, GN, and DDT reduces the weight wear intensity and the friction coefficient of the tribo-pairs by 1.4, 3.5, 4.0 and 1.8, 2.3, 3.2 times, respectively. Such an improvement in the tribological properties of highly porous titanium after surface hardening is explained by changes in the main wear mechanism of the tribo-pairs from adhesive and fatigue to abrasive. The highest wear resistance of highly porous titanium was observed after surface deformation–diffusion treatment, as this treatment provides a combination of the positive effects of both ball burnishing (closing of surface pores) and nitriding (formation of a surface chemically inert and hard nitride layer).

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Section: Discussionmentioning

confidence: 99%

Improving Wear Resistance of Highly Porous Titanium by Surface Engineering Methods

Lavrys,

Pohrelyuk,

Padgurskas

et al. 2023

Coatings

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“…Samples with a certain composition were subjected to laser heating until a melt formed. It should also be noted, that for many years researchers successfully used thermochemical treatment in a controlled oxygen or nitrogen-containing gas environment to improve functional properties such as oxidation resistance [63], long-term strength [64] of zirconium alloys, and a set of mechanical properties [65,66], tribological properties [67] of oxidized titanium alloys.…”

Section: Prerequisites For Formation Of Zirconium Oxynitridesmentioning

confidence: 99%

Influence of interstitial elements (oxygen, nitrogen) on properties of zirconium alloys (review)

Trush

Pylypenko

Stoev

et al. 2022

Phys. Chem. Solid St.

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A review of the regularities of the influence of interstitial elements (oxygen, nitrogen) on the properties of zirconium alloys was presented. It was noted that in the scientific and technical literature dates the main attention is paid to the bulk alloying of zirconium alloys with oxygen and nitrogen at high temperatures. It was shown that zirconium with nitrogen and oxygen forms a number of stable compounds of suboxides and subnitrides. The physico-mechanical characteristics of zirconium after heat treatment under media containing both oxygen and nitrogen components on the properties of zirconium alloys were analysed. Наведено літературний огляд закономірностей впливу елементів проникнення (кисню, азоту) на властивості цирконієвих сплавів. Наголошено, що у науково-технічній літературі основну увагу приділено об'ємному легуванню цирконієвих сплавів киснем та азотом. Показано, що цирконій з азотом та киснем утворює ряд стабільних сполук субоксидів та субнітридів. Наведено фізико-механічні характеристики цирконію після обробки в середовищах, що містять одночасно кисневу та азотну компоненти.

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“…Thermochemical treatment (TCT) is one of the effective methods of controlling the structure and characteristics of the near-surface layers of metals, improves their physical and mechanical properties [9][10][11][12]. Thanks to TCT, it is possible to form hydrogen barrier layers.…”

Section: Introductionmentioning

confidence: 99%

PROPERTIES OF TUBES FROM Zr-1% Nb ALLOY AFTER THERMOCHEMICAL TREATMENT AND HYDROGENATION

Trush¹,

Voyevodin²,

Stoev³

et al. 2021

Problems of Atomic Science and Technology

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The influence of treatment in controlled gas environments with subsequent hydrogenation on the physical and mechanical characteristics of the Zr-1% Nb zirconium alloy has been investigated. The surface hardness and the size of the diffusion-hardened layer of the ring-samples cut from fuel tubes from the Zr-1% Nb alloy after treatment in oxygen- and nitrogen-containing gaseous media with subsequent saturation with hydrogen have been established. The influence of the parameters of the gaseous medium and the modes of thermochemical treatment (TCT) of specimens-rings on the destructive stresses under static load at temperatures of 20 and 380 °C is shown. It was revealed that treatment in the investigated gas environment increases the resistance to hydrogen saturation and has a positive effect on the long-term strength of ring specimens from the zirconium alloy Zr-1% Nb.

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

Cited by 14 publications

References 1 publication

Improving Wear Resistance of Highly Porous Titanium by Surface Engineering Methods

Improving Wear Resistance of Highly Porous Titanium by Surface Engineering Methods

Influence of interstitial elements (oxygen, nitrogen) on properties of zirconium alloys (review)

PROPERTIES OF TUBES FROM Zr-1% Nb ALLOY AFTER THERMOCHEMICAL TREATMENT AND HYDROGENATION

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