Effect of Thermo-Mechanical Processing on the Mechanical Properties of Molybdenum - 2 Volume % Lanthana.

Mueller, A. J. ; Shields, J. A. ; Buckman, R. W.

Technical Information Center Oak Ridge Tennessee

关键词: Mechanical properties;    Molybdenum;    Lanthanum oxides;    Theromechanical treatments;    Tensile properties;   

RP-ID  :  DE2005835081

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Variations in oxide species and consolidation method have been shown to have a significant effect on the mechanical properties of oxide dispersion strengthened (ODS) molybdenum material. The mechanical behavior of molybdenum - 2 Volume % La(sub)2O(sub)3 mill product forms, produced by a wet doping process, were characterized over the temperature range of -150 degrees C to 1800 degrees C. The various mill product forms evaluated ranged from thin sheet stock to bar stock. Tensile properties of the material in the various product forms were not significantly affected by the vast difference in total cold work. Creep properties, however, were sensitive to the total amount of cold work as well as the starting microstructure. Stress-relieved material had superior creep rupture properties to recrystallized material at 1200 degrees C, while at 1500 degrees C and above the opposite was observed. Thus it is necessary to match the appropriate thermo-mechanical processing and microstructure of molybdenum - 2 volume % LA(sub)2O(sub)3 to the demands of the application being considered.