Surface Modification of EBF3-Fabricated Ti-6Al-4V Parts by Ultrasonic Impact Treatment

被引：2

作者：

Panin, Alexey ^{[1
]}

Kazachenok, Marina ^{[1
]}

Perevalova, Olga ^{[1
]}

Kolmakov, Alexey ^{[1
]}

机构：

[1] Inst Strength Phys & Mat Sci SB RAS, Tomsk 634055, Russia

来源：

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON PHYSICAL MESOMECHANICS. MATERIALS WITH MULTILEVEL HIERARCHICAL STRUCTURE AND INTELLIGENT MANUFACTURING TECHNOLOGY | 2020年 / 2310卷

基金：

俄罗斯科学基金会;

关键词：

D O I：

10.1063/5.0034461

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Mechanical post-processing of 3D-printed components are required due to their poor surface finish, non-uniform microstructure and high residual stresses. Ultrasonic impact treatment can be successfully used for surface modification of Ti-6Al-4V titanium alloy parts manufactured by electron beam free-form fabrication. The gradient microstructure of the surface layers, produced in 3D-printed Ti-6Al-4V parts under ultrasonic impact treatment, was revealed using transmission electron microscopy. Non-equiaxial nanosized alpha-Ti grains were revealed in the outmost surface layer of 5-10 mu m thick. alpha-Ti crystal grains with average size 150 nm are observed at depth of 20 mu m beneath the specimen's surface. Finally, the average size of alpha-phase grains at a depth of 35 m below the surface is equal to 400 nm. Orthorhombic alpha '' martensitic phase within fine alpha-Ti grains is observed. The mechanism of alpha '' phase formation during ultrasonic impact treatment is discussed.

引用

页数：4

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