Hot Corrosion Behavior of Ti-48Al and Ti-48Al-2Cr Intermetallic Alloys Produced by Electric Current Activated Sintering

被引：17

作者：

Garip, Y. ^{[1
]}

Ozdemir, O. ^{[1
]}

机构：

[1] Sakarya Univ, Fac Technol, Dept Met & Mat Engn, Esentepe Campus, TR-54187 Sakarya, Turkey

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2018年 / 49A卷 / 06期

关键词：

ISOTHERMAL OXIDATION BEHAVIOR; HIGH-TEMPERATURE OXIDATION; NA2SO4; MO;

D O I：

10.1007/s11661-018-4581-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, Ti-48Al and Ti-48Al-2Cr (at. pct) intermetallic alloys were produced by electric current activated sintering (ECAS). In order to characterize the phase formation and microstructures of these alloys, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD) analysis were used. The XRD result shows that the intermetallic alloys are composed of gamma-TiAl and alpha(2)-Ti3Al phases. The microstructure is dense with a low amount of porosity. The hot corrosion behavior of intermetallic alloys was carried out in a salt mixture of 25 wt pct K2SO4 and 75 wt pct Na2SO4 at 700 degrees C for 180 hours. The morphology of corroded surfaces was observed by SEM-EDS and XRD. Corrosion phases were identified as TiO2 and Al2O3. Well-adhering oxide scale was detected on the corroded sample surface at the end of 180 hours, and no spallation was observed. In addition, a parabolic curve was obtained at the weight change rate vs time. (C) The Minerals, Metals & Materials Society and ASM International 2018

引用

页码：2455 / 2462

页数：8

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