Selective electron beam melting of NiTi: Microstructure, phase transformation and mechanical properties

2019 ◽  
Vol 744 ◽  
pp. 290-298 ◽  
Author(s):  
Quan Zhou ◽  
Muhammad Dilawer Hayat ◽  
Gang Chen ◽  
Song Cai ◽  
Xuanhui Qu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
Electron Beam ◽  
Electron Beam Melting ◽  
Selective Electron Beam Melting

Cellular Ti6Al4V with carbon nanotube-like structures fabricated by selective electron beam melting

2014 ◽  
Vol 20 (6) ◽  
pp. 541-550 ◽  
Author(s):  
Yujie Quan ◽  
Philipp Drescher ◽  
Faming Zhang ◽  
Eberhard Burkel ◽  
Hermann Seitz
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Electron Beam ◽  
Carbon Nanotube ◽  
Young’S Modulus ◽  
Electron Beam Melting ◽  
Young's Modulus ◽  
Cellular Solids ◽  
Content Type ◽  
Selective Electron Beam Melting

Purpose – The purpose of this paper is to fabricate cellular Ti6Al4V with carbon nanotube (CNT)-like structures by selective electron beam melting and study the resultant mechanical properties based on each respective geometry to provide fundamental information for optimizing molecular architectures and predicting the mechanical properties of cellular solids. Design/methodology/approach – Cellular Ti6Al4V with CNT-like zigzag and armchair structures are fabricated by selected electron beam melting. The microstructures and mechanical properties of these samples are evaluated utilizing scanning electron microscopy, synchrotron radiation X-ray and compressive tests. Findings – The mechanical properties of the cellular solids depend on the geometry of strut architectures. The armchair-structured Ti6Al4V samples exhibit Young’s modulus from 501.10 to 707.60 MPa and compressive strength from 8.73 to 13.45 MPa. The zigzag structured samples demonstrate Young’s modulus from 548.19 to 829.58 MPa and compressive strength from 9.32 to 16.21 MPa. The results suggest that the zigzag structure of the Ti6Al4V cellular solids can achieve improved mechanical properties and the mechanism for the enhanced mechanical properties in the zigzag structures was revealed. Originality/value – The results provide an innovative example for modulating the mechanical properties of cellular titanium by adjusting the unit cell geometry. The Ti6Al4V cellular solids with single-walled CNT-like structures could be used as light-weight construction components or filters in industries. The Ti6Al4V with multiwalled CNT-like structures could be used as new scaffolds for biomedical applications.

Selective Electron Beam Melting (SEBM) of Pure Tungsten: Metallurgical Defects, Microstructure, Texture and Mechanical Properties

2021 ◽  
Author(s):  
Xin Ren ◽  
Hui Peng ◽  
Jingli Li ◽  
Hailin Liu ◽  
Liming Huang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Electron Beam ◽  
Energy Density ◽  
Relative Density ◽  
Electron Beam Melting ◽  
Ultimate Compressive Strength ◽  
Pure Tungsten ◽  
Selective Electron Beam Melting ◽  
Metallurgical Defects

Abstract Effects of processing parameters on the metallurgical defects, microstructure, texture and mechanical properties of pure tungsten samples fabricated by selective electron beam melting (SEBM) are investigated. SEBM-fabricated bulk tungsten samples with features of lack of fusion, sufficient fusion, and over-melting are examined. For samples upon sufficient fusion, an ultimate compressive strength of 1.76 GPa is achieved at the volumetric energy density of 900 J/mm 3 ~1000 J/mm 3. The excellent compressive strength is higher and the associated volumetric energy density is significantly lower than corresponding reported values in literature. The average relative density of SEBM-fabricated samples is 98.93%, and no microcracks but only pores with diameters of few tens of micrometers are found in SEBM-ed tungsten samples of sufficient fusion. Properties of samples by SEBM and selective laser melting (SLM) have also been compared. It is found that SLM-fabricated samples exhibit inevitable microcracks, and have a significantly lower ultimate compressive strength and a slightly lower relative density of 98.51% in comparison with SEBM-ed samples.

Sign in / Sign up

Export Citation Format

Share Document