Thermodynamic analysis of oxygen refining during electron-beam additive manufacturing of pure titanium products

•Oxygen concentration of CP-Ti product fabricated by EBAM was lower than raw powder.•Oxygen refining during EBAM of CP-Ti product was thermodynamically analyzed.•Temperature and oxygen partial pressure induced the reduction from TiO2 to Ti. Chemical composition of pure titanium, particularly oxygen,...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters 2019-02, Vol.236, p.106-108
Main Authors: Park, Hyung-Ki, Na, Tae-Wook, Yang, Seung-Min, Kim, Gun-Hee, Lee, Byoung-Soo, Kim, Hyung Giun
Format: Article
Language:English
Subjects:
Additive manufacturing
Chemical composition
Electron beam additive manufacturing
Electron beams
Materials science
Mechanical properties
Organic chemistry
Oxygen
Oxygen concentration
Oxygen refining
Partial pressure
Thermodynamics
Titanium
Titanium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Oxygen concentration of CP-Ti product fabricated by EBAM was lower than raw powder.•Oxygen refining during EBAM of CP-Ti product was thermodynamically analyzed.•Temperature and oxygen partial pressure induced the reduction from TiO2 to Ti. Chemical composition of pure titanium, particularly oxygen, severely affects mechanical properties of product. Oxygen refining during electron-beam additive manufacturing (EBAM) of pure titanium products was thermodynamically analyzed. The oxygen concentration of the titanium sample fabricated by EBAM was 0.172%, which was lower than that of the initial titanium powders (0.228%). This was mainly because the TiO2 native oxide layer formed on the initial powders reduced during EBAM, thereby decreasing the oxygen concentration. Analysis of temperature and oxygen partial pressure in the EBAM building chamber confirmed the occurrence of reduction and hence the oxygen refining effect.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2018.10.083