منابع مشابه
Ripple coarsening on ion beam-eroded surfaces
The temporal evolution of ripple pattern on Ge, Si, Al 2 O 3, and SiO 2 by low-energy ion beam erosion with Xe (+) ions is studied. The experiments focus on the ripple dynamics in a fluence range from 1.1 × 10(17) cm(-2) to 1.3 × 10(19) cm(-2) at ion incidence angles of 65° and 75° and ion energies of 600 and 1,200 eV. At low fluences a short-wavelength ripple structure emerges on the surface t...
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Abstract: A combination of a finite element method (FEM) algorithm with ANSYS codes and post image processing of NDT ultrasonic images along with laboratory cooling experiments and microstructural analysis provide a guideline to determine the optimum cooling rate for any grade of steel in which the highest productivity can be achieved without any degradation of the cast steel products. The sugg...
متن کاملKope and Fairview Ripple Marks: Brown and Adams Counties, Ohio
The directional data of cross-laminae and ripple marks in the Kope and Fairview Formations in Brown and Adams Counties, Ohio, show no statistically significant difference in mean orientation. The prevailing paleocurrent direction was towards the northnorthwest. A significant difference, however, exists between the wave lengths of the ripples in the Kope and Fairview. Ripple marks are larger in ...
متن کاملMicrostructural Effect on the Weldability of 25Cr-35Ni Cast Steel
The 25Cr-35Ni heat resistant steel has been widely used when resistance to oxidation and creep rapture at elevated temperatures is required. In this paper, the microstructural effect on the weldability of this alloy is investigated. The results of this study indicate that this steel has a perfect weldability in the as cast condition but does not possess good weldability in the aged condition. T...
متن کاملEffect of Porosity on the Stiffness of Cast Steel
The effect of porosity on the elastic behavior of cast steel is investigated experimentally, and an approach for including porosity effects in finite element analysis (FEA) simulations is presented. Porous cast steel specimens are mechanically tested having apparent elastic moduli reduced between 17 and 61 pct. Analysis of radiographs and tomography is used to measure and reconstruct the porosi...
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ژورنال
عنوان ژورنال: ISIJ International
سال: 2013
ISSN: 0915-1559,1347-5460
DOI: 10.2355/isijinternational.53.1180