Effect of processing parameters on the density, microstructure and strength of pure tungsten fabricated by selective electron beam melting

被引：58

作者：

Yang, Guangyu ^{[1
]}

Yang, Pengwei ^{[2
]}

Yang, Kun ^{[1
]}

Liu, Nan ^{[1
]}

Jia, Liang ^{[1
]}

Wang, Jian ^{[1
]}

Tang, Huiping ^{[1
]}

机构：

[1] Northwest Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian 710016, Shaanxi, Peoples R China

[2] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2019年 / 84卷

关键词：

Additive manufacturing; Selective electron beam melting (SEBM); Powder bed fusion; Pure tungsten; LASER; DENSIFICATION; ALLOY; SUPPRESSION; MECHANISM; FUSION; PHASE; AL;

D O I：

10.1016/j.ijrmhm.2019.105040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pure tungsten samples were prepared by the selective electron beam melting (SEBM) process. The effect of the SEBM process parameters on the density, microstructure and compression strength of pure tungsten was studied. In addition, the influence of substrate preheating temperature during SEBM was studied. A processing window for additive manufacturing of pure tungsten by SEBM was preliminarily determined. Pure tungsten samples with relative density of 99.5% and without obvious pores and microcracks were successfully fabricated. The as-built pure tungsten samples showed strong columnar grain structures. Compression strength along the columnar grains in the build direction was measured to be 1560 MPa. Fracture occurred predominantly along the columnar grain boundaries by decohesion, in addition to brittle transgranular fracture. Refinement and strengthening of the columnar grain boundaries are expected to improve the compression strength of the SEBM-fabricated pure tungsten.

引用

页数：7

共 33 条

[1] Tungsten-based materials for fuel cell applications [J].

Antolini, Ermete ;

Gonzalez, Ernesto R. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2010, 96 (3-4) :245-266

[2] Electron beam melting of Ti-48Al-2Cr-2Nb alloy: Microstructure and mechanical properties investigation [J].

Biamino, S. ;

Penna, A. ;

Ackelid, U. ;

Sabbadini, S. ;

Tassa, O. ;

Fino, P. ;

Pavese, M. ;

Gennaro, P. ;

Badini, C. .

INTERMETALLICS, 2011, 19 (06) :776-781

[3] Selective laser melting-fabricated Ti-6Al-4V alloy: Microstructural inhomogeneity, consequent variations in elastic modulus and implications [J].

Cho, J. Y. ;

Xu, W. ;

Brandt, M. ;

Qian, M. .

OPTICS AND LASER TECHNOLOGY, 2019, 111 :664-670

[4] Effect of process parameters on the Selective Laser Melting (SLM) of tungsten [J].

Enneti, Ravi K. ;

Morgan, Rick ;

Atre, Sundar V. .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2018, 71 :315-319

[5] Comparison of Microstructures and Mechanical Properties for Solid and Mesh Cobalt-Base Alloy Prototypes Fabricated by Electron Beam Melting [J].

Gaytan, S. M. ;

Murr, L. E. ;

Martinez, E. ;

Martinez, J. L. ;

Machado, B. I. ;

Ramirez, D. A. ;

Medina, F. ;

Collins, S. ;

Wicker, R. B. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2010, 41A (12) :3216-3227

[6] Selective laser melting of tungsten and tungsten alloys [J].

Ivekovic, Aljaz ;

Omidvari, Neda ;

Vrancken, Bey ;

Lietaert, Karel ;

Thijs, Lore ;

Vanmeensel, Kim ;

Vleugels, Jef ;

Kruth, Jean-Pierre .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2018, 72 :27-32

[7] Selective laser melting additive manufacturing of Inconel 718 superalloy parts: Densification, microstructure and properties [J].

Jia, Qingbo ;

Gu, Dongdong .

JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 585 :713-721

[8] Additive manufacturing of Ti-45Al-4Nb-C by selective electron beam melting for automotive applications [J].

Juechter, V ;

Franke, M. M. ;

Merenda, T. ;

Stich, A. ;

Koerner, C. ;

Singer, R. F. .

ADDITIVE MANUFACTURING, 2018, 22 :118-126

[9] Macrosegregation mechanism of primary silicon phase in selective laser melting hypereutectic Al - High Si alloy [J].

Kang, Nan ;

Coddet, Pierre ;

Liao, Hanlin ;

Coddet, Christian .

JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 662 :259-262

[10]

Lassner W.-D. S. Erik, 1998, TUNGSTEN PROPERTIES

← 1 2 3 4 →