Low temperature relaxation of residual stress in Ti–6Al–4V

2005 ◽  
Vol 52 (10) ◽  
pp. 1051-1056 ◽  
Author(s):  
J.W. Elmer ◽  
T.A. Palmer ◽  
S.S. Babu ◽  
E.D. Specht
Keyword(s):  
Residual Stress ◽  
Low Temperature ◽  
Temperature Relaxation

scholarly journals Influence of Preaging Temperature on the Indentation Strength of 3Y-TZP Aged in Ambient Atmosphere

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2767
Author(s):  
Ki-Won Jeong ◽  
Jung-Suk Han ◽  
Gi-Uk Yang ◽  
Dae-Joon Kim
Keyword(s):  
Residual Stress ◽  
Phase Transformation ◽  
Low Temperature ◽  
Compressive Residual Stress ◽  
Yttria Stabilized Zirconia ◽  
Ambient Atmosphere ◽  
Aged Specimen ◽  
Stabilized Zirconia ◽  
M Phase ◽  
The Relationship

Yttria-stabilized zirconia (3Y-TZP) containing 0.25% Al2O3, which is resistant to low temperature degradation (LTD), was aged for 10 h at 130–220 °C in air. The aged specimens were subsequently indented at loads ranging from 9.8 to 490 N using a Vickers indenter. The influence of preaging temperature on the biaxial strength of the specimens was investigated to elucidate the relationship between the extent of LTD and the strength of zirconia restorations that underwent LTD. The indented strength of the specimens increased as the preaging temperature was increased higher than 160 °C, which was accompanied by extensive t-ZrO2 (t) to m-ZrO2 (m) and c-ZrO2 (c) to r-ZrO2 (r) phase transformations. The influence of preaging temperature on the indented strength was rationalized by the residual stresses raised by the t→m transformation and the reversal of tensile residual stress on the aged specimen surface due to the indentation. The results suggested that the longevity of restorations would not be deteriorated if the aged restorations retain compressive residual stress on the surface, which corresponds to the extent of t→m phase transformation less than 52% in ambient environment.

Low-Temperature Relaxation and Elastic Properties of YBa2Cu3Ox with Different Oxygen Content

1993 ◽  
Vol 119-121 ◽  
pp. 701-706 ◽  
Author(s):  
H.-J. Kaufmann ◽  
P.P. Pal-Val ◽  
L.N. Pal-Val ◽  
V.D. Natsik ◽  
J. Fickert ◽  
...  
Keyword(s):  
Low Temperature ◽  
Elastic Properties ◽  
Oxygen Content ◽  
Temperature Relaxation
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