THE REACTIVE ELEMENT EFFECT IN COMMERCIAL ODS FECRAL ALLOYS

被引：181

作者：

PINT, BA ^{[1
]}

GARRATTREED, AJ ^{[1
]}

HOBBS, LW ^{[1
]}

机构：

[1] MIT,HH UHLIG CORROS LAB,CAMBRIDGE,MA 02139

来源：

MATERIALS AT HIGH TEMPERATURES | 1995年 / 13卷 / 01期

关键词：

REACTIVE ELEMENT EFFECT; INCO MA956; KANTHAL APM;

D O I：

10.1080/09603409.1995.11689496

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two commercial oxide dispersion strengthened alumina-forming FeCrAl alloys, Inco alloy MA956 and Kanthal alloy APM, were studied in order to look at the effect of reactive elements on their oxidation behaviour. MA956 has a distribution of Y(2)O3-Al2O3 particles, while APM has a ZrO2-Al2O3 distribution. Isothermal oxidation at 1000 degrees C and 1200 degrees C showed a reduced oxidation rate for both alloys compared to that of an undoped FeCrAl alloy. In short-term cyclic tests at 1200 degrees C, both alloys exhibited excellent scale adhesion. Using scanning transmission electron microscopy with X-ray energy dispersive spectroscopy, both Y and Zr, respectively, were found to segregate to the oxide grain boundaries and the metal-scale interface after oxidation at 1000 degrees C and 1200 degrees C. These experimental observations are discussed with regard to a new theory to explain the reactive element effect.

引用

页码：3 / 16

页数：14

共 116 条

[51] EFFECT OF DISPERSED OXIDES OF RARE-EARTHS AND OTHER REACTIVE ELEMENTS ON THE HIGH-TEMPERATURE OXIDATION RESISTANCE OF FE-20CR ALLOY [J].