Microscopy of Alloy Formation on Arc Plasma Sintered Oxide Dispersion Strengthen (ODS) Steel

International Conference on Green and Renewable Energy Resources 2016

能源学;生态环境科学

Bandriyana, B.^1 ; Sujatno, A.^1 ; Salam, R.^1 ; Dimyati, A.^1 ; Untoro, P.^1

Center for Science and Technology for Advanced Materials, Batan, Indonesia^1

关键词: Alloy formation;    Alloying process;    Elemental compositions;    Microstructure formation;    Structure and properties;    Structure materials;    The scanning electron microscopes (SEM);    X-ray diffraction spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/75/1/012021/pdf
DOI  :  10.1088/1755-1315/75/1/012021

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The oxide dispersed strengthened (ODS) alloys steel developed as structure material for nuclear power plants (NPP) has good resistant against creep due to their unique microstructure. Microscopy investigation on the microstructure formation during alloying process especially at the early stages was carried out to study the correlation between structure and property of ODS alloys. This was possible thanks to the arc plasma sintering (APS) device which can simulate the time dependent alloying processes. The ODS sample with composition of 88 wt.% Fe and 12 wt.% Cr powder dispersed with 1 wt.% ZrO2 nano powder was mixed in a high energy milling, isostatic compressed to form sample coins and then alloyed in APS. The Scanning Electron Microscope (SEM) with X-ray Diffraction Spectroscopy (EDX) line scan and mapping was used to characterize the microstructure and elemental composition distribution of the samples. The alloying process with unification of each Fe and Cr phase continued by the alloying formation of Fe-Cr by inter-diffusion of both Fe and Cr and followed by the improvement of the mechanical properties of hardness.