Graying effect

P. J. Marto and V. H. Gray, Effects of High Accelerations and Heat Fluxes on Nucleate Boiling of Water in an Axisymmetric Rotating Boiler, NASA TN D-6307, NASA, Cleveland, OH, 1971. 

The finer aluminum types appear darker, and particularly in the fine range of 3-10 pm, have a graying effect in combination with not very bright colorants. 

The filling is either white or a neutral color, and a grayed effect is produced in the areas of the design. 

X. M. Dong, T. Kimura, J-F. Revol, and D. G. Gray, Effects of Ionic Strength on the Isotropic-Chiral Nematic Phase Transition of Suspensions of Cellulose Crystallites. Langmuir 12, 2076-2082(1996). 

X. M. Dong, J.-F. Revol, and G. Gray, Effect of microcrystalhte preparation conditions on the formation of colloid crystals of cellulose. Cellulose 5,19-32 (1998). 

In a specification for testing graying effects issued by the automotive industry, specimens are exposed to artificial weathering for 800 h in a 1200 CPS Xenotester. The test cycle involves 18 min raining and 102 min irradiation with a radiation intensity of 50 W/m and a black standard temperature of 63°C. Subsequently, the test materials are dipped for five minutes in an aqueous solution of automotive detergent (95 5 vol. ratio). Solution temperature is 85°C [514]. 

Departure of gas from grayness has so marked an effect on radiative transfer that the subject will be presented prior to discussion of the systems covered by Table 5-10. 

Shock-recovery experiments by Gray [10] were conducted to assess directly if the strain-path reversal inherent to the shock contains a traditional microstructurally controlled Bauschinger effect for a shock-loaded two-phase material. Two samples of a polycrystalline Al-4 wt.% Cu alloy were shock loaded to 5.0 GPa and soft recovered in the same shock assembly to assure identical shock-loading conditions. The samples had two microstructural... 

Recent experiments by Gray et al. [47] have probed the contribution of the Bauschinger effect on real-time unloading wave profiles and postshock... 

G.T. Gray III, P.S. Follansbee, and C.E. Frantz, Effect of Residual Strain on the Substucture Development and Mechanical Response of Shock-Loaded Copper, Mater. Sci. Engrg. AIII (1989), 9. 

G.T. Gray III, The Effect of Residual Strain on Twinning in Shock-Loaded Copper, in Proc. 44th Annual Meeting of Electron Microscopy Soc. (edited by G.W. Bailey), San Francisco Press, 1986, 422 pp. 

G.T. Gray III, R.S. Hixson, and C.E. Morris, Bauschinger Effect During Shock Loading, in Shock Compression of Condensed Matter (edited by S.C. Schmidt, R.D. Dick, J.W. Forbes, and D.G. Tasker), Elsevier Science, New York, 1992, pp. 427-430. 

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