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Title: Investigation on the primary creep of a nickel based alloy. [Nimonic 75 type alloy]

It is widely accepted that dislocation climb is involved in the steady state (i.e. secondary) creep at high temperatures, which is characterized by the formation and evolution of substructures. In current theories of steady state creep, dislocation climb is regarded as the rate controlling process. However, the role of dislocation climb in the primary (i.e. transient) creep at high temperatures is not clear. The present paper is to report the observations by transmission electron microscopy (TEM) on high temperature creep of a nickel based alloy. It will be shown that dislocation climb plays an important role not only in the steady state creep, but also in the primary creep.
Authors:
;  [1]
  1. (Inst. of Solid State Physics, Hefei (China))
Publication Date:
OSTI Identifier:
6449465
Resource Type:
Journal Article
Resource Relation:
Journal Name: Scripta Metallurgica et Materialia; (United States); Journal Volume: 29:1
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; NIMONIC; CREEP; DISLOCATIONS; EXPERIMENTAL DATA; HEAT TREATMENTS; NICKEL BASE ALLOYS; TEMPERATURE RANGE 1000-4000 K; TRANSMISSION ELECTRON MICROSCOPY; ALLOYS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DATA; ELECTRON MICROSCOPY; INFORMATION; LINE DEFECTS; MECHANICAL PROPERTIES; MICROSCOPY; NICKEL ALLOYS; NUMERICAL DATA; TEMPERATURE RANGE 360103* -- Metals & Alloys-- Mechanical Properties; 360102 -- Metals & Alloys-- Structure & Phase Studies