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Keywords: ageing
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Journal Articles
Article Type: Bridging Microstructure, Properties, And Processing Of Polymer-Based Advanced Materials
J. Eng. Mater. Technol. January 2012, 134(1): 010903.
Published Online: December 12, 2011
... UV-visible irradiation (λ > 290 nm at 35 °C) has been investigated using several techniques such as infrared spectroscopy, UV-visible spectrophotometry, and gel fraction measurements. Different photo-products resulting from the photo-ageing such as alcohol, ketone, or acids as well as cross-linked...
Journal Articles
Article Type: Research Papers
J. Eng. Mater. Technol. July 2010, 132(3): 031016.
Published Online: June 24, 2010
...- and microparticles and were especially formulated for bonded-in timber connections, and the properties of bulk adhesives and adhesively bonded block shear specimens were evaluated. After 90 days of aging the results demonstrate critical temperature effects controlled by the glass transition temperature. The apparent...
Journal Articles
Article Type: Research Papers
J. Eng. Mater. Technol. July 2008, 130(3): 031007.
Published Online: June 10, 2008
... and hardness measurements and was correlated to the microstructures of the weld and base material. Stir zones (SZs) in the 5083 specimens were much softer than the strain-hardened base materials. SZs in the 6111 material are approximately as hard as the base material. Natural aging of 6111 FSW specimens...
Journal Articles
Article Type: Research Papers
J. Eng. Mater. Technol. July 2008, 130(3): 031003.
Published Online: May 22, 2008
...J. S. Robinson; D. A. Tanner Aerospace aluminum alloy forgings can have the residual stresses arising from heat treatment reduced by modification to the quench cooling rates and subsequent aging treatments. A series of propeller hubs usually made from the alloy 2014 have been closed die forged from...
Journal Articles
Article Type: Research Papers
J. Eng. Mater. Technol. January 2006, 128(1): 107–116.
Published Online: August 1, 2005
...K. V. Pochiraju; G. P. Tandon This paper describes modeling of degradation behavior of high-temperature polymers under thermo-oxidative aging conditions. Thermo-oxidative aging is simulated with a diffusion-reaction model in which temperature, oxygen concentration, and weight-loss effects...
Journal Articles
Article Type: Research Papers
J. Eng. Mater. Technol. January 2006, 128(1): 34–40.
Published Online: June 8, 2005
... of cure during the prescribed aging time. Results suggest that the degree of conversion is limited to 80% for the vinyl-ester oligomer and 90–95% for styrene following a postcure of 93°C. It is observed that after 300 days of ambient storage the nonpostcured samples approach the degree of conversion...
Journal Articles
Article Type: Research Papers
J. Eng. Mater. Technol. October 2005, 127(4): 476–482.
Published Online: April 5, 2005
... to thermal aging has been investigated. The SP testing technique has been applied to materials aged under various aging conditions, and correlation with the results of Charpy V-notch impact tests has been examined. The experimental results reveal that SP fracture energy at room temperature decreases...
Journal Articles
Article Type: Research Papers
J. Eng. Mater. Technol. October 2004, 126(4): 413–419.
Published Online: November 9, 2004
... data, including the effects of physical aging at nonuniform temperature. Modifications to classical testing methods and protocols are presented to obtain accurate and repeatable data that can support long-term predictions with nonuniform temperature conditions through time. These techniques are used...
Journal Articles
Article Type: Technical Papers
J. Eng. Mater. Technol. January 2001, 123(1): 28–35.
Published Online: December 26, 2000
... of first-order differential equations yields the response of a material element to a given input. There have been few attempts to model such a behavior. Yaguchi and Takahashi 10 introduce an aging stress that has negative rate sensitivity together with the positive rate dependence of the overstress...
Journal Articles
Article Type: Technical Papers
J. Eng. Mater. Technol. April 2001, 123(2): 198–202.
Published Online: September 22, 2000
... by strain aging due to interstitial carbon and nitrogen. Figure 6 shows the results for annealed 304 N and cold-rolled type 304 specimens. In both cases, the change in the displacement could not be detected, and the decrease of bolt stress was suppressed to around 2 percent. Although the initial stress...
Journal Articles
Article Type: Technical Papers
J. Eng. Mater. Technol. July 2000, 122(3): 273–278.
Published Online: February 23, 2000
... be associated with the normal aging phenomena or by the development of damage in the material, most previous analyses of creep data have been empirical. It has been implicitly assumed that similar forms of creep curves can be adequately represented by a single generic equation. However, it is clear...