Microstructures and Hardness of the High Chromium Oxide Dispersion Strengthened Alloy Fe-25Cr-Y2O3Sintered by the Arc Plasma Sintering (APS)

Bandriyana, Arbi Dimyati, Agus Sujatno, Rohmad Salam, Sumaryo, Pudji Untoro, Bambang Suharno

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Abstract

High chromium ODS alloy has been developed for application as structural material in high temperature nuclear reactor. In the present study, Fe-25Cr-Y2O3 with dispersed 0.5 wt.% Ytria (Y2O3) were synthesized and characterized by means of various techniques as a function of milling time 1, 2 and 3 hours. The alloy synthesis was carried out by the Mechanical Alloying (MA) process and subsequent sintering by means the new plasma technique using the APS apparatus. Scaning Electron Microscopy (SEM) and X-ray diffraction (XRD) were conducted for morphology and phase analysis. Evaluation of the mechanical properties was studied based on the Vickers hardness measurement. SEM examination revealed that the sample after sintering by APS method at different milling duration exhibited some particle aglomeration and homogenized oxide dispersion that obviously strengthened the alloy. The XRD test, however, proved the formation of the main phase Fe-Cr. The alloy showed exceptionally high hardness of 193 VHR which is mainly due to the grain refining that increase by the increasing of the milling time.

Original languageEnglish
Article number012045
JournalIOP Conference Series: Materials Science and Engineering
Volume333
Issue number1
DOIs
Publication statusPublished - 6 Apr 2018
Event2nd International Conference on Advanced Material for Better Future 2017, ICAMBF 2017 - Surakarta, Indonesia
Duration: 4 Sep 20175 Sep 2017

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