Literature Review: Weldability of Iridium DOP-26 Alloy for General Purpose Heat Source

Burgardt, Paul¹  Pierce, Stanley W.¹ 

[1] Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

关键词: Iridium;    DOP-26;    GPHS;    GTAW;   

DOI  :  10.2172/1330078
RP-ID  :  LA-UR--16-28000
PID  :  OSTI ID: 1330078

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The basic purpose of this paper is to provide a literature review relative to fabrication of the General Purpose Heat Source (GPHS) that is used to provide electrical power for deep space missions of NASA. The particular fabrication operation to be addressed here is arc welding of the GPHS encapsulation. A considerable effort was made to optimize the fabrication of the fuel pellets and of other elements of the encapsulation; that work will not be directly addressed in this paper. This report consists of three basic sections: 1) a brief description of the GPHS will be provided as background information for the reader; 2) mechanical properties and the optimization thereof as relevant to welding will be discussed; 3) a review of the arc welding process development and optimization will be presented. Since the welding equipment must be upgraded for future production, some discussion of the historical establishment of relevant welding variables and possible changes thereto will also be discussed.