An Analysis of High Temperature Metal Creep—Part I: Experimental Definition of an Alloy

The general objective of the research reported is to develop a constitutive theory for the elevated temperature behavior of Wrought Udiment 700. A major part of this work was to establish a data base for this material and evaluate the observed response using many of the modern approaches to constitutive modeling. The phenomenological description of the material was evaluated by a series of load rate, strain rate, and creep tests. These data clearly showed the existence of a finite primary creep rate response function similar to the minimum creep rate function. Also the concept of material stress rate coordinate is introduced to describe the change from the primary to the minimum creep rate.