Electrically Assisted Ultrasonic Nanocrystal Surface Modification of Ti6Al4V Alloy

被引：18

作者：

Liu, Jun ^{[1
]}

Suslov, Sergey ^{[2
]}

Li, Shengxi ^{[3
]}

Qin, Haifeng ^{[4
]}

Ren, Zhencheng ^{[1
]}

Doll, Gary L. ^{[4
]}

Cong, Hongbo ^{[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 Akron, Dept Chem & Biomol Engn, Akron, OH 44325 USA

[4] Univ Akron, Timken Engn Surfaces Labs, Akron, OH 44325 USA

来源：

ADVANCED ENGINEERING MATERIALS | 2018年 / 20卷 / 01期

关键词：

Ultrasonic nanocrystal surface modification; electrically assisted deformation; severe plastic deformation; nanocrystalline; dynamic precipitation; SEVERE PLASTIC-DEFORMATION; AUSTENITIC STAINLESS-STEEL; TI-6AL-4V ALLOY; HIGH-STRENGTH; MECHANICAL-PROPERTIES; RESIDUAL-STRESSES; ROLLING PROCESS; WARM; BEHAVIOR; SUPERPLASTICITY;

D O I：

10.1002/adem.201700470

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, an innovative process, electrically assisted ultrasonic nanocrystal surface modification (EA-UNSM), is used to process Ti6Al4V alloy. As compared with traditional UNSM, EA-UNSM results in lower dislocation density and larger grains due to the thermal annealing effect caused by resistive heating. In addition, deeper plastic deformation layer is observed in the electrically assisted case. By supplying mechanical energy and thermal energy simultaneously, a strong dynamic precipitation effect is induced, which generates nanoscale precipitates in the EA-UNSM-treated Ti6Al4V alloy. These nanoscale precipitates can effectively pin dislocations during plastic deformation and thus significantly improve the surface hardness.

引用

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页数：6

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