Friction stir processing of Ni-base alloys

被引:0
作者
Lippold, J. C. [1 ]
Rodelas, J. M. [1 ]
Rule, J. R. [1 ]
机构
[1] Ohio State Univ, Columbus, OH 43210 USA
来源
PROCEEDINGS OF THE 1ST INTERNATIONAL JOINT SYMPOSIUM ON JOINING AND WELDING | 2013年
关键词
friction stir processing; Ni-base alloys; microstructure; characterization; mechanical properties; MECHANICAL-PROPERTIES; MICROSTRUCTURE; PRECIPITATION;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Friction stir processing has been conducted on both solid-solution strengthened and precipitation-strengthened nickel base alloys. All processing was conducted using a W-25Re tool material with a small cone angle. Processing depths were on the order of 2 mm. Processing windows for Alloys 625, 718 and Hastelloy X were established in terms of processing speed and spindle rotation. Process forces and processing temperatures measured using embedded thermocouples are reported. Microstructure characterization revealed a dramatic decrease in grain size as a result of processing. Additive friction stir processing was conducted by depositing a precipitation hardenable Alloy 282 filler metal on an Alloy 600 substrate and then using friction stir processing to modify the aswelded microstructure. High resolution characterization indicated that gamma-prime precipitates were present in the as-processed layer and that large increases in hardness (strength) could be achieved by an aging heat treatment relative to the welded and aged condition.
引用
收藏
页码:369 / 376
页数:8
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