By J. T. M. De Hosson, C. A. Brebbia
The significance of touch and floor results in glossy engineering and their mixed results led the organisers to reconvene this ninth foreign convention, which covers similar issues: Computational tools and Experiments involved Mechanics and floor results. these days the significance of touch and floor difficulties in lots of technological fields is easily understood. they're complicated and inherently non-linear as a result of relocating boundary and the several homes of fabrics, fairly alongside the touch surfaces. Structural elements fail by means of put on, corrosion, excessive cycle fatigue and so on, that's to claim they're tormented by floor stipulations. using floor remedies can lessen the price of elements and expand the lifetime of the weather for surfaces present process touch, an issue that's in particular addressed via the convention. This booklet includes papers from the 9th overseas convention on floor results and make contact with Mechanics: Computational tools and Experiments, and discusses the subsequent subject matters: floor remedies; Thick coatings; skinny coatings; floor difficulties involved mechanics; Indentation and hardness; Fatigue; Numerical research; functions and case stories.
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Extra info for Surface Effects and Contact Mechanics IX: Computational Methods and Experiments
Carbonitriding. ASM Handbook, Heat Treating, 4, ASM International, Materials Park, Ohio, pp. 376-384, 1991. , Steels: Processing, Structure, and Performance, ASM International, Metals Park, Ohio, pp. 456-460, 2005. , Gaseous and plasma nitrocarburizing. ASM Handbook, Heat Treating, 4, ASM International, Materials Park, Ohio, pp. 425-436, 1991. , Practical Nitriding and Ferritic Nitrocarburizing, ASM International, Materials Park, Ohio, pp. 193-194, 201-202, 2003. , Alsaran, A. , The investigation of structural, mechanical and tribological properties of plasma nitrocarburized AISI 1020 steel.
Figure 1: SEM image of laser clad sample cut in direction perpendicular to substrate bar axes and almost parallel to cladding direction. The arrow indicates direction of substrate movement during laser cladding. All laser clads were deposited on the substrate consisting of 42CrMo4 steel bar with diameter of 25 mm. The bar was horizontally mounted into a rotation clamp to rotate bar around its axis. The rotation speed at the bar surface actually represents the laser beam scanning speed during the laser cladding.
Fig. 10 depicts the atomic concentration of each element against the argon-ion sputtering time. Sputtering time is proportional to passive layer depth . It can be observed in Fig. 10 that chromium is enriched in the surface of passive layer. Oxygen and ferrous increase with the sputtering time. The passive film can be described by a bi-layer model (inner oxide and outer hydroxide layers) . 4 Conclusion The study presented shows the differences in corrosion behaviour of 316L stainless steel after dichromate passivated.