Effect of arc plasma sintering process on formation of TiO2surface layer for Ti-6Al-4V applications

S. Supriadi, M. P. Gatot, F. A. Roseno, D. Annur, B. Suharno, A. Dimyati

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Titanium has a high affinity with oxygen forming a protective layer TiO2. At elevated temperature, the TiO2 layer loses its protective properties. It causes oxygen to diffuse into bulk material and makes the material become brittle, hard and has poor machinability. This experiment aims to minimize the formation of TiO2 layer during the sintering process. The Ti-6Al-4V powder was compacted and then sintered using an arc plasma sintering (APS) with a current of 40 A, 50 A, and 60 A for 8 minutes to produce a sintered specimen protected from oxidation. As comparison, conventional sintering was carried out with an argon atmosphere with a temperature of 1100°C, 1200°C and 1300°C for 4 hours. Optical Microscope (OM), SEM-EDS, X-Ray Diffraction (XRD), density, and hardness tests were carried out to analyze the results of the sintered process. The TiO2 layer from the result of the arc plasma sintering process is thinner than the conventional sintering. Phases obtained from the arc plasma sintering and conventional sintering are α and β titanium. The relative density obtained using the arc plasma sintering process can reach up to 99%, higher than the conventional sintering result. Hardness values from arc plasma sintering process at 40 A, 50 A and 60 A are 297, 333, and 378 HV. Meanwhile, the hardness values from conventional sintering are 414, 427, and 469 HV, respectively.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Seminar on Metallurgy and Materials, ISMM 2019
Subtitle of host publicationExploring New Innovation in Metallurgy and Materials
EditorsNono Darsono, Yudi Nugraha Thaha, Aga Ridhova, Ahmad Rhamdani, Muhammad Satrio Utomo, Faried Miftahur Ridlo, Mukhlis Agung Prasetyo
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735419919
DOIs
Publication statusPublished - 21 Apr 2020
Event3rd International Seminar on Metallurgy and Materials: Exploring New Innovation in Metallurgy and Materials, ISMM 2019 - Tangerang Selatan, Indonesia
Duration: 23 Oct 201924 Oct 2019

Publication series

NameAIP Conference Proceedings
Volume2232
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Seminar on Metallurgy and Materials: Exploring New Innovation in Metallurgy and Materials, ISMM 2019
Country/TerritoryIndonesia
CityTangerang Selatan
Period23/10/1924/10/19

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