Surface nanocrystallization by ultrasonic nano-crystal surface modification and its effect on gas nitriding of Ti6A14V alloy

被引：47

作者：

Liu, Jun ^{[1
]}

Suslov, Sergey ^{[2
]}

Vellore, Azhar ^{[3
]}

Ren, Zhencheng ^{[1
]}

Amanov, Auezhan ^{[4
]}

Pyun, Young-Sik ^{[4
]}

Martini, Ashlie ^{[3
]}

Dong, Yalin ^{[1
]}

Ye, Chang ^{[1
]}

机构：

[1] Univ Akron, Dept Mech Engn, Akron, OH 44325 USA

[2] Qatar Fdn, QEERI, Doha, Qatar

[3] Univ Calif Merced, Dept Mech Engn, Merced, CA 95343 USA

[4] Sun Moon Univ, Dept Mech Engn, Asan 31460, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 736卷

关键词：

Ti64; Gas nitriding; Ultrasonic nanocrystal surface modification; Surface severe plastic deformation; Nanocrystalline; Scratch test; MECHANICAL ATTRITION TREATMENT; SEVERE PLASTIC-DEFORMATION; TI-6AL-4V ALLOY; FATIGUE BEHAVIOR; TITANIUM-ALLOYS; THERMAL-OXIDATION; FRETTING WEAR; STEEL; TEMPERATURE; PERFORMANCE;

D O I：

10.1016/j.msea.2018.08.089

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of Ultrasonic Nanocrystal Surface Modification (UNSM) on the gas nitriding behavior of Ti6A14V alloy have been investigated. Gas nitriding was performed at 700 and 800 degrees C. The microstructure after UNSM and gas nitriding was characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Microstructural investigations revealed the formation of an approximately 10 mu m thick severe plastic deformation layer as well as nano-grains after UNSM treatment. The UNSM-treated Ti6A14V alloy formed 0.26 mu m and 1.35 mu m thick nitride layers after nitriding at 700 degrees C and 800 degrees C, respectively, and UNSM resulted in an increased layer thickness relative to untreated samples at both temperatures. The results suggest that nitrogen adsorption and reaction capability were enhanced in the UNSM-treated Ti6A14V alloy. This enhancement can be attributed to high-density dislocations and grain boundaries that were introduced by UNSM and served as efficient channels for nitrogen diffusion.

引用

页码：335 / 343

页数：9

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[1] Fretting wear and friction reduction of CP titanium and Ti-6Al-4V alloy by ultrasonic nanocrystalline surface modification [J].