skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of thermal cycling and thermal aging on the mechanical properties of, and residual stresses in, Ni-YSZ/YSZ bi-layers

Abstract

No abstract prepared.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1]
  1. ORNL
  2. Oak Ridge National Laboratory (ORNL)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
FE USDOE - Office of Fossil Energy (FE)
OSTI Identifier:
936553
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 30th International Conference on Advanced Ceramics and Composites, Cocoa Beach, FL, USA, 20060122, 20060122
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AGING; CERAMICS; MECHANICAL PROPERTIES; RESIDUAL STRESSES; THERMAL CYCLING; NICKEL; YTTRIUM OXIDES; STRONTIUM OXIDES; ZIRCONIUM OXIDES

Citation Formats

Lara-Curzio, Edgar, Radovic, Miladin, Trejo, Rosa M, Crofer, C, Watkins, Thomas R, and More, Karren Leslie. Effect of thermal cycling and thermal aging on the mechanical properties of, and residual stresses in, Ni-YSZ/YSZ bi-layers. United States: N. p., 2007. Web.
Lara-Curzio, Edgar, Radovic, Miladin, Trejo, Rosa M, Crofer, C, Watkins, Thomas R, & More, Karren Leslie. Effect of thermal cycling and thermal aging on the mechanical properties of, and residual stresses in, Ni-YSZ/YSZ bi-layers. United States.
Lara-Curzio, Edgar, Radovic, Miladin, Trejo, Rosa M, Crofer, C, Watkins, Thomas R, and More, Karren Leslie. Mon . "Effect of thermal cycling and thermal aging on the mechanical properties of, and residual stresses in, Ni-YSZ/YSZ bi-layers". United States. doi:.
@article{osti_936553,
title = {Effect of thermal cycling and thermal aging on the mechanical properties of, and residual stresses in, Ni-YSZ/YSZ bi-layers},
author = {Lara-Curzio, Edgar and Radovic, Miladin and Trejo, Rosa M and Crofer, C and Watkins, Thomas R and More, Karren Leslie},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • The thermal aging of Ni-Cr-Mo-Fe Alloy (Hastelloy Alloy X) at 1000/sup 0/, 1200/sup 0/, 1400/sup 0/, and 1600/sup 0/F (538/sup 0/, 649/sup 0/, 760/sup 0/, and 871/sup 0/C) for times up to 15,000 h is discussed together with the associated changes in room-temperature impact toughness properties. Effects of 10,000-h aging on room-temperature and elevated-temperature tensile properties, and stress-rupture properties were also evaluated. The alloy exhibits a substantial drop in room-temperature tensile ductility, while elevated-temperature tensile ductility was relatively unaffected by the aging. Stress-rupture properties, while affected by the 1600/sup 0/F (871/sup 0/C) aging, were relatively unaffected by the lower agingmore » temperatures. The correlation between mechanical properties and microstructure is discussed.« less
  • A procedure and correlations are presented for predicting mechanical properties of cast stainless steels in service at temperatures <450{degrees}C from known material information. The ``saturation`` fracture properties of a cast stainless steel, i.e., the minimum values that would be achieved for the material after long-term service, are estimated from the chemical composition of the steel. Fracture properties as a function of time and temperature of service are estimated from the kinetics of embrittlement, which are also determined from chemical composition. The correlations successfully predict fracture toughness, Charpy-impact, and tensile properties of cast stainless steels from the Shippingport-, Ringhals-, and Gundremmingen-reactormore » components.« less
  • NiAl-based hybrid composites containing 5, 15 and 30 volume percent of Al{sub 2}O{sub 3} fibers in addition to AlN dispersion particles were fabricated via a powder metallurgy route. The strengthening mechanisms associated with the short Al{sub 2}O{sub 3} fiber in NiAl-(AlN){sub dispersion}-(Al{sub 2}O{sub 3}){sub fiber} composite were studied with an emphasis on the effect of thermal residual stress on the compressive strength at room temperature and 1,300K. At 300K, the yield strength of the composites was predicted using a linear superposition of the monolithic yield strength, direct fiber strengthening and tensile matrix residual stresses. The prediction shows good agreement withmore » the measured data. The majority of the room temperature strengthening is attributable to the residual stress. At 1,300K, the strengthening was achieved only by the load sharing of the fibers and there is no direct influence from the process-induced thermal residual stresses since they were completely relaxed at this temperature.« less
  • This work investigates properties of large grained, high purity niobium with respect to the forming of superconducting radio frequency (SRF) cavities from such large grained sheets. The yield stresses were examined using tensile specimens that were essentially single crystals in orientations evenly distributed in the standard projection triangle. No distinct yield anisotropy was found, however, vacuum annealing increased the yield strength by a factor 2..3. The deep drawing forming operation of the half cells raises the issues of elastic shape changes after the release of the forming tool (springback) and residual stresses, both of which are indicated to be negligible.more » This is a consequence of the low yield stress (< 100 MPa) and the large thickness (compared to typical thicknesses in sheet metal forming). However, the significant anisotropy of the transversal plastic strains after uniaxial deformation points to potentially critical thickness variations for large grained / single crystal half cells, thus raising the issue of controlling grain orientation or using single crystal sheet material.« less
  • This article assesses the effect of residual stresses on the compression strength, flexural strength, modulus of elasticity, wear resistance, and microhardness of steel-30KhGSA under conditions of thermal cycling. Test procedures and results for the steel, a candidate material for use in coke ovens, are presented.