A simple approach for analysing the surface texture transfer in cold rolling of metal strips

2017 ◽  
Vol 95 (1-4) ◽  
pp. 597-608 ◽  
Author(s):  
Chuhan Wu ◽  
Liangchi Zhang ◽  
Peilei Qu ◽  
Shanqing Li ◽  
Zhenglian Jiang
Keyword(s):  
Cold Rolling ◽  
Surface Texture ◽  
Simple Approach ◽  
Texture Transfer

Cold-rolling of Ti-rich TiAl polysynthetically twinned crystals

1990 ◽  
Vol 5 (3) ◽  
pp. 484-487 ◽  
Author(s):  
S. R. Nishitani ◽  
M. H. Oh ◽  
A. Nakamura ◽  
T. Fujiwara ◽  
M. Yamaguchi
Keyword(s):  
Cold Rolling ◽  
Shear Deformation ◽  
Surface Texture ◽  
Room Temperature ◽  
Stoichiometric Composition ◽  
Rolling Direction ◽  
Rolling Plane ◽  
Total Reduction ◽  
Pole Figures

Polysynthetically twinned crystals of TiAl with a nearly stoichiometric composition have been grown and rolled at room temperature. The maximum total reduction in thickness which is attainable without fracture depends on lamellae orientation with respect to the rolling plane and rolling direction. When specimens are oriented such that shear deformation parallel to the lamellar planes is operative during rolling and its operation causes lengthening of specimens, such specimens can be rolled up to about 50% reduction in thickness. The (111) pole figures are determined for the surface of specimens rolled to several different amounts of reduction, and the formation of surface texture is briefly discussed.

Effect of the elastic deformation of rolls on the surface texture transfer in skin-pass rolling

2021 ◽  
Vol 198 ◽  
pp. 106358 ◽  
Author(s):  
Chuhan Wu ◽  
Liangchi Zhang ◽  
Peilei Qu ◽  
Shanqing Li ◽  
Zhenglian Jiang
Keyword(s):  
Elastic Deformation ◽  
Surface Texture ◽  
Skin Pass ◽  
Texture Transfer

An Investigation into the Texture Transfer in the Process of Lubricated Skin Pass Rolling

2021 ◽  
Vol 143 (9) ◽  
Author(s):  
Chuhan Wu ◽  
Liangchi Zhang ◽  
Peilei Qu ◽  
Shanqing Li ◽  
Zhenglian Jiang ◽  
...  
Keyword(s):  
Surface Texture ◽  
Critical Role ◽  
Pressure Coefficient ◽  
New Method ◽  
Element Analysis ◽  
Random Surface ◽  
Transfer Ratio ◽  
Skin Pass ◽  
Texture Transfer ◽  
Transfer Mechanisms

Abstract This article investigates the surface texture transfer mechanisms in lubricated skin pass rolling of metal strips with three-dimensional rough surfaces of both regular patterns and random surface asperity distributions. Two important steps have been completed. The first is the successful establishment of an efficient numerical method for predicting the 3D texture transfer. It was identified that the new method can be used reliably with the key complex factors coupled in skin pass rolling, such as the effects of lubricant and surface roughness. The second is the exploration of the texture transfer mechanisms with the aid of this new method. In addition, the effects of hydrodynamic pressure on the texture transfer efficiency were comprehensively investigated by a dynamic explicit finite element analysis. It was found that lubrication plays a critical role in determining the surface texture transfer. The texture transfer ratio decreases with increasing the lubricant viscosity. A larger pressure coefficient brings about a lower texture transfer ratio, but a larger reduction ratio leads to a greater texture transfer.

The Influence of the Crystallographic Texture of Titanium on its Corrosion Resistance in Biological Media

2018 ◽  
Vol 769 ◽  
pp. 42-47 ◽  
Author(s):  
Ivan V. Ivanov ◽  
Alexander Thoemmes ◽  
Adelya A. Kashimbetova
Keyword(s):  
Corrosion Resistance ◽  
Electron Beam ◽  
Cold Rolling ◽  
Titanium Alloys ◽  
Surface Texture ◽  
Crystallographic Texture ◽  
Biological Media ◽  
Basal Surface ◽  
Corrosion Properties ◽  
Biological Compatibility

In this study, relationship between corrosion resistance and crystallographic texture of α-titanium alloys has been investigated. Samples of α-titanium with different crystallographic texture were obtained by using non-vacuum electron beam cladding as well as cold rolling with a deformation ratios ε ~ 30% and ε ~ 60%. Obtained results show that the crystallographic texture of the surface of titanium influences the corrosion properties and biological compatibility the highest of corrosion resistance corresponds to alloys with a basal surface texture ((0001), (0002)).

Surface texture transfer in skin-pass rolling with the effect of roll surface wear

Wear ◽  
2021 ◽  
pp. 203764
Author(s):  
Chuhan Wu ◽  
Liangchi Zhang ◽  
Peilei Qu ◽  
Shanqing Li ◽  
Zhenglian Jiang ◽  
...  
Keyword(s):  
Surface Texture ◽  
Surface Wear ◽  
Roll Surface ◽  
Skin Pass ◽  
Texture Transfer

A new method for predicting the three-dimensional surface texture transfer in the skin pass rolling of metal strips

Wear ◽  
2019 ◽  
Vol 426-427 ◽  
pp. 1246-1264 ◽  
Author(s):  
Chuhan Wu ◽  
Liangchi Zhang ◽  
Peilei Qu ◽  
Shanqing Li ◽  
Zhenglian Jiang
Keyword(s):  
Surface Texture ◽  
Three Dimensional ◽  
New Method ◽  
Skin Pass ◽  
Texture Transfer ◽  
Dimensional Surface

Influence of X-Ray Induced Fluorescence on Energy Dispersive X-Ray Analysis of Thin Foils

1977 ◽  
Vol 35 ◽  
pp. 328-329
Author(s):  
E. A. Kenik ◽  
J. Bentley
Keyword(s):  
Thin Foil ◽  
Electron Excitation ◽  
Simple Approach ◽  
Foil Thickness ◽  
X Rays ◽  
X Ray ◽  
Hole Spectrum ◽  
Illumination System ◽  
Thin Foils ◽  
Intensity Ratios

Cliff and Lorimer (1) have proposed a simple approach to thin foil x-ray analy sis based on the ratio of x-ray peak intensities. However, there are several experimental pitfalls which must be recognized in obtaining the desired x-ray intensities. Undesirable x-ray induced fluorescence of the specimen can result from various mechanisms and leads to x-ray intensities not characteristic of electron excitation and further results in incorrect intensity ratios.In measuring the x-ray intensity ratio for NiAl as a function of foil thickness, Zaluzec and Fraser (2) found the ratio was not constant for thicknesses where absorption could be neglected. They demonstrated that this effect originated from x-ray induced fluorescence by blocking the beam with lead foil. The primary x-rays arise in the illumination system and result in varying intensity ratios and a finite x-ray spectrum even when the specimen is not intercepting the electron beam, an ‘in-hole’ spectrum. We have developed a second technique for detecting x-ray induced fluorescence based on the magnitude of the ‘in-hole’ spectrum with different filament emission currents and condenser apertures.

Microanalytical Identification of a New Zr-Nb-Fe Phase

1990 ◽  
Vol 48 (2) ◽  
pp. 132-133
Author(s):  
O.T. Woo ◽  
G.J.C. Carpenter
Keyword(s):  
Trace Elements ◽  
Cold Rolling ◽  
Proportionality Factor ◽  
Tube Material ◽  
X Ray ◽  
Metal Foils ◽  
Arc Melting ◽  
Intermetallic Particles ◽  
Intermetallic Precipitates ◽  
Cold Worked

To study the influence of trace elements on the corrosion and hydrogen ingress in Zr-2.5 Nb pressure tube material, buttons of this alloy containing up to 0.83 at% Fe were made by arc-melting. The buttons were then annealed at 973 K for three days, furnace cooled, followed by ≈80% cold-rolling. The microstructure of cold-worked Zr-2.5 at% Nb-0.83 at% Fe (Fig. 1) contained both β-Zr and intermetallic precipitates in the α-Zr grains. The particles were 0.1 to 0.7 μm in size, with shapes ranging from spherical to ellipsoidal and often contained faults. β-Zr appeared either roughly spherical or as irregular elongated patches, often extending to several micrometres.The composition of the intermetallic particles seen in Fig. 1 was determined using Van Cappellen’s extrapolation technique for energy dispersive X-ray analysis of thin metal foils. The method was employed to avoid corrections for absorption and fluorescence via the Cliff-Lorimer equation: CA/CB = kAB · IA/IB, where CA and CB are the concentrations by weight of the elements A and B, and IA and IB are the X-ray intensities; kAB is a proportionality factor.

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