HIGH TEMPERATURE CHARACTERISTICS OF Ni3Al ALLOYS AT VARIOUS TESTING CONDITIONS

被引：0

作者：

Malcharczikova, Jitka ^{[1
]}

Michenka, Vit ^{[2
]}

Pohludka, Martin ^{[1
]}

Kursa, Miroslav ^{[1
]}

Kanak, David ^{[2
]}

机构：

[1] Tech Univ Ostrava, Fac Met & Mat Engn, Dept Nonferrous Met Refining Proc & Mat Recycling, Ostrava, Czech Republic

[2] VUHZ As, Dobra, Czech Republic

来源：

METAL 2014: 23RD INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS | 2014年

关键词：

Ni3Al based alloys; directional solidification; creep; mechanical characteristics; NICKEL-BASED SUPERALLOYS; MICROSTRUCTURE; STRESS;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Samples of Ni3Al based alloys with hypo-stoichiometric composition Ni-24Al and Ni-22Al were directionally solidified at rates of 50 and 70 mm/h. The directionally solidified samples were used for creep tests at 900 degrees C. Testing was performed under a load of 200 MPa in an argon atmosphere. Due to the fact that materials of this type are used in demanding environments, the selected tests were also performed in argon saturated with water vapour. It can be concluded that the applied atmospheres have no significant effect on the creep behaviour of the studied samples. The Ni-22Al alloy exhibits longer times to rupture than the alloy Ni-24Al under the same testing conditions. No significant differences in the appearance and quantity of corrosion products on the surface of the samples were observed.

引用

页码：1310 / 1315

页数：6

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