Analysis of Creep-Rupture Data for Five Multiheat Alloys by the Minimum-Commitment Method Using Double Heat-Term-Centering Technique. Final Report

摘要

The heat term concept of adapting the Minimum Commitment Method for characterizing individual heats of multi-heat materials data is further developed and applied in this report. Using heat-centering, the number of constants in each phase of the analysis is greatly reduced, permitting the use of desk-top microcomputers (e.g. Commodore Pet 2001), programs for which are contained in the report. The method is applied with good results to five multiheats of engineering interest (2 1/4 Cr-1 Mo, AISI 304, and AISI 316 Stainless Steels from ORNL studies, AISI 304 from National Research Institute for Metals, Japan, and a British low alloy steel). A preliminary study is presented to show that it is possible that the long-term characteristics of a particular heat of construction material can be estimated to a high degree of accuracy using short-time data from that heat together with longer-time data from other heats of the same material. (ERA citation 08:046714)