Graded Microstructure and Mechanical Performance of Ti/N-Implanted M50 Steel with Polyenergy

Jin, Jie; Shao, Tianmin

doi:10.3390/ma10101204

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…The feasibility of using ion implantation to improve the hardness and tribological characteristics of bearing steels is confirmed by the results of studies in [14]. Authors established the interrelation between physical and mechanical properties after alternate surface implantation with titanium and nitrogen ions.…”

Section: Literature Review and Problem Statementmentioning

confidence: 82%

Analysis and comparison of mechanical and chemical properties of protective coatings obtained at different combinations of "target – substrate"

Vasetskaya

2019

EEJET

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Досліджено вплив різних комбінацій «мішень -сталева підкладка» на механічні та хімічні властивості захисних покриттів, отриманих за допомогою іонно-плазмової обробки. Широке застосування іонно-плазмових технологій для зміцнення виробів стримується недосконалістю обладнання, відсутністю достатніх теоретичних і експериментальних досліджень з контролю і регулювання фізичних властивостей і технічних параметрів процесу обробки. Зняття цих проблем можливе на підставі подальших досліджень і нових рішень в області технології зміцнення. Для досліджень в цьому напрямку використовувалася експериментальна іонно-плазмова установка з програмним забезпеченням для регулювання і контролю енергії, дози, концентрації імплантованих іонів, тиску робочого газу, товщини покриття. Застосована ефективна методика підвищення якості робочої поверхні сталевого інструменту, яка дозволила здійснити масоперенос легуючих елементів поверхневою іонно-плазмовою обробкою. За рахунок регульованої низькотемпературної двохстадійної іонізації атомів азоту і легуючих елементів в реакційному обсязі відбувалося насичення кристалічної решітки заліза імплантованими іонами і утворення карбонітридних фаз легуючих елементів, відповідальних за підвищення твердості, зносо-і корозійної стійкості. Виявлено оптимальні параметри процесу імплантації ( Uп=25 кВ, Iп=35 мА, D=4,01 . 10 17 cм -2 за 1 год. ), які дозволили досягти поліпшення поверхневих властивостей конструкційної вуглецевої, конструкційної легованої, інструментальної сталей. Встановлено взаємозв'язок між терміном служби виробів і властивостями отриманої після імплантації поверхні. Показано збільшення терміну служби виробів з покриттям ТiN (в 1,5-3 рази), CrN (в 1,9-6 разів) і ZrN (в 3-12 разів) в порівнянні з виробами без покриття. Проведено аналіз і визначено найбільш ефективні варіанти комбінацій «мішень -сталева підкладка» для практичного застосування захисних покриттів. Оскільки застосування порівняно недорогих сталевих виробів з підвищеними характеристиками міцності має економічні вигоди для виробника і є однією з тенденцій сучасного виробництваКлючові слова: іонна імплантація, захисне покриття, сталева підкладка, зносостійкість, термін служби UDC 533.59

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Section: Literature Review and Problem Statementmentioning

confidence: 82%

Analysis and comparison of mechanical and chemical properties of protective coatings obtained at different combinations of "target – substrate"

Vasetskaya

2019

EEJET

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“…Moreover, the PT samples showed two peaks at 396.2 and 403.6 eV, corresponding to metal nitride [ 54 , 57 ] and N–O bonding [ 47 , 58 ], respectively, showing that a metallic nitride layer was formed during the N-PIII on the PT sample. Nitrogen atomic distribution along the depth of the M50 steel was reported to be in the range of 4–50 nm after N-PIII; the treatment increased the nano-indentation hardness and consequently improved the wear resistance [ 59 ]. Thus, the nitrogen implantation chemistry modification at the nanometric scale also affected the electrochemical behavior of the surface; this topic is discussed in detail in the following Section 3.3 .…”

Section: Resultsmentioning

confidence: 99%

Surface Modification of an Absorbable Bimodal Fe-Mn-Ag Alloy by Nitrogen Plasma Immersion Ion Implantation

et al. 2023

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Recently, Fe-Mn-based alloys have been increasingly catching the attention of the scientific community, because of their tunable and outstanding mechanical properties, and suitable degradation behavior for biomedical applications. In spite of these assets, their corrosion rate (CR) is, in general, too low to satisfy the requirements that need to be met for cardiovascular device applications, such as stents. In fact, the CR is not always the same for all of the degradation stages of the material, and in addition, a finely tuned release rate, especially during the first steps of the corrosion pattern, is often demanded. In this work, a resorbable bimodal multi-phase alloy Fe-3Mn-1Ag was designed by mechanical alloying and spark plasma sintering (SPS) to accelerate the corrosion rate. The presence of several phases, for example α-Fe, α-Mn, γ-FeMn and Ag, provided the material with excellent mechanical properties (tensile strength UTS = 722 MPa, tensile strain A = 38%) and a higher corrosion rate (CR = 3.2 ± 0.2 mm/year). However, higher corrosion rates, associated with an increased release of degradation elements, could also raise toxicity concerns, especially at the beginning of the corrosion pattern. In this study, The focus of the present work was the control of the CR by surface modification, with nitrogen plasma immersion ion implantation (N-PIII) treatment that was applied to mechanically polished (MP) samples. This plasma treatment (PT) improved the corrosion resistance of the material, assessed by static degradation immersion tests (SDITs), especially during the first degradation stages. Twenty-eight days later, the degradation rate reached the same value of the MP condition. Nitrogen compounds on the surface of the substrate played an important role in the corrosion mechanism and corrosion product formation. The degradation analysis was carried out also by potentiodynamic tests in modified Hanks’ balanced salt solution (MHBSS), and Dulbecco’s phosphate buffered saline solution (DPBSS). The corrosion rate was higher in MHBSS for both conditions. However, there was no significant difference between the corrosion rate of the PT in DPBSS (CR = 1.9 ± 0.6 mm/year) and in MHBSS (CR = 2 ± 1.4 mm/year). The cell viability was assessed with human vein endothelial cells (HUVECs) via an indirect metabolic activity test (MTT assay). Due to the lower ion release of the PT condition, the cell viability increased significantly. Thus, nitrogen implantation can control the in vitro corrosion rate starting from the very first stage of the implantation, improving cell viability.

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“…Xiao demonstrated that the surface energy of materials decreased with decreasing grain size within an ultrafine grain size scope (<20 nm) through theoretical molecular dynamics [24]. Therefore, the wettability induced by N + and N + + Ti + high-energy ion implantation and high-energy ion coating of TiN was probably related to the formation of ceramic phases and an amorphous sublayer on the surface [25].…”

Section: Discussionmentioning

confidence: 99%

A Study on the Wettability of Ion-Implanted Stainless and Bearing Steels

Chen

Yin

Jin

2019

Metals

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To satisfy the harsh service demand of stainless steel and aviation bearing steel, the anticorrosion and wettability behaviors of 9Cr18 stainless steel and M50 bearing steel tailored by ion beam surface modification technology were experimentally investigated. By controlling the ion implantation (F+, N+, N+ + Ti+) or deposition processes, different surface-modified layers and ceramic layers or composite layers with both effects (ion implantation and deposition processes) were obtained on metal surfaces. The wettability was characterized by a contact angle instrument, and the thermodynamics stabilization of ion implantation-treated metals in corrosive solution was evaluated through an electrochemical technique. X-ray photoelectron spectroscopy (XPS) was employed for detecting the chemical bonding states of the implanted elements. The results indicated that ion implantation or deposition-induced surface-modified layers or coating layers could increase water contact angles, namely improving hydrophobicity as well as thermodynamic stabilization in corrosive medium. Meanwhile, wettability with lubricant oil was almost not changed. The implanted elements could induce the formation of new phases in the near-surface region of metals, and the wettability behaviors were closely related to the as-formed ceramic components and amorphous sublayer.

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Graded Microstructure and Mechanical Performance of Ti/N-Implanted M50 Steel with Polyenergy

Cited by 11 publications

References 20 publications

Analysis and comparison of mechanical and chemical properties of protective coatings obtained at different combinations of "target – substrate"

Analysis and comparison of mechanical and chemical properties of protective coatings obtained at different combinations of "target – substrate"

Surface Modification of an Absorbable Bimodal Fe-Mn-Ag Alloy by Nitrogen Plasma Immersion Ion Implantation

A Study on the Wettability of Ion-Implanted Stainless and Bearing Steels

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