发明名称 |
CORROSION RESISTANT ARTICLE AND METHODS OF MAKING |
摘要 |
An article and method of forming the article are disclosed. The article has a surface comprising a nanostructured ferritic alloy. The surface includes a plurality of nanofeatures that include complex oxides of yttrium and titanium disposed in an iron-bearing alloy matrix. The iron-bearing alloy matrix at the surface includes about 5 weight percent to about 30 weight percent of chromium, and about 0.1 weight percent to about 10 weight percent of molybdenum. Further, a concentration of a chi phase or a sigma phase in the nanostructured ferritic alloy at the surface is less than about 5 volume percent. The method generally includes the steps of milling, thermo-mechanically consolidating, annealing, and then cooling at a rate that hinders the formation of chi and sigma phases in the nanostructured ferritic alloy at the surface. |
申请公布号 |
US2016017464(A1) |
申请公布日期 |
2016.01.21 |
申请号 |
US201414334742 |
申请日期 |
2014.07.18 |
申请人 |
General Electric Company |
发明人 |
Huang Shenyan;Didomizio Richard;Rebak Raul Basilio |
分类号 |
C22C33/02;B22F3/15;C22C38/22;B22F9/04;B22F3/17;B22F3/20;B22F3/14;B22F3/24 |
主分类号 |
C22C33/02 |
代理机构 |
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代理人 |
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主权项 |
1. An article, comprising:
a surface comprising a nanostructured ferritic alloy, the alloy comprising a plurality of nanofeatures disposed in an iron-bearing alloy matrix, the plurality of nanofeatures comprising complex oxide particles, wherein the complex oxide particles comprise yttrium and titanium; wherein the matrix at the surface comprises about 5 weight percent to about 30 weight percent chromium, and about 0.1 weight percent to about 10 weight percent molybdenum; and wherein a concentration of a chi phase or a sigma phase in the nanostructured ferritic alloy at the surface is less than about 5 volume percent. |
地址 |
Schenectady NY US |