DEVELOPMENT OF ODS HEAT EXCHANGER TUBING

Mark A. Harper, Ph.D.

Huntington Alloys (United States)

关键词: Corrosion;    Alloys;    Testing;    Processing;    Cold Working;   

DOI  :  10.2172/813637
RP-ID  :  NONE
RP-ID  :  FC26-00NT40970
RP-ID  :  813637

美国|英语

来源: UNT Digital Library

【 摘 要 】

Work continued on three major tasks of this project--increasing the circumferential strength of MA956 tubing, joining of the MA956 alloy, and determination of the high temperature corrosion limits of the MA956 alloy. With respect to increasing the circumferential strength of a MA956 tube, all of the cold working operations (0, 10, 20, 30, 40%) and annealing treatments (1000, 1150, 1300 C) have been completed. The sample microstructures produced by this processing continue to be analyzed with TEM results providing valuable information on the strengthening mechanism of this alloy. Creep testing to determine the ''stress threshold'' curves for this alloy continues. Regarding joining of the MA956 alloy, additional welds were produced with the friction welding and transient liquid phase bonding techniques. And finally, laboratory high temperature corrosion testing of the material continues in both fluid-side and fire-side simulated environments.