Intermetallic reinforced Cr alloys for high-temperature use

被引：26

作者：

Brady, MP ^{[1
]}

Zhu, JH ^{[1
]}

Liu, CT ^{[1
]}

Tortorelli, PF ^{[1
]}

Walker, LR ^{[1
]}

McKamey, CG ^{[1
]}

Wright, JL ^{[1
]}

Carmichael, CA ^{[1
]}

Larson, DJ ^{[1
]}

Miller, MK ^{[1
]}

Porter, WD ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

来源：

MATERIALS AT HIGH TEMPERATURES | 1999年 / 16卷 / 04期

关键词：

intermetallic reinforced Cr alloys; Cr; oxidation; Laves phase; mechanical properties; MgO;

D O I：

10.3184/096034099783641047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new family of Cr(Ta)-Cr(2)Ta intermetallic alloys based on Cr-(6-10)Ta (at%) is currently under development for structural use in oxidizing environments in the 1,000-1,300 degrees C temperature range. These alloys show excellent strength and creep resistance and good oxidation resistance at high temperatures in air. Oxidation resistance comparable to commercial reactive element doped chromia-forming alloys and creep resistance comparable to single-crystal superalloys have been demonstrated. To date, only modest room-temperature fracture toughness (in the 11-12 MPa m(1/2) range) has been achieved. Preliminary results of a promising approach to improve room-temperature fracture toughness via ductilization of Cr with MgO additions are discussed.

引用

页码：189 / 193

页数：5

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