scholarly journals INFLUENCE OF WARM ROLLING AND RECRYSTALLIZATION ANNEALING ON MECHANICAL AND METALLOGRAPHIC PROPERTIES OF THE SUPERALLOY N07080

2021 ◽  
Vol 9 (10) ◽  
pp. 680-689
Author(s):  
Omer Beganovic ◽  
◽  
Belma Fakic ◽  
Branka Muminovic ◽  
◽  
...  
Keyword(s):  
Grain Size ◽  
Cross Section ◽  
Warm Rolling ◽  
Recrystallization Temperature ◽  
Recrystallization Annealing ◽  
Warm Deformation ◽  
Partial Recrystallization ◽  
The Cross ◽  
Selection Of

Additional strengthening of superalloy N07080 described in this work was achieved by warm rolling. Control of the ratio of strength and ductile properties of the superalloy is possible by appropriate selection of the amount of warm deformation and the appropriate selection of the partial recrystallization temperature. In addition, recrystallization annealing makes it possible to equalize the grain size across the cross section of the warm rolled bars, which before recrystallization differ significantly in size in the central and peripheral parts of the bars.

scholarly journals Selection of the cross-section design for the LHC main dipole

2000 ◽  
Vol 10 (1) ◽  
pp. 65-68 ◽  
Author(s):  
P. Fessia ◽  
D. Perini ◽  
S. Russenschuk ◽  
C. Voellinger ◽  
R. Vuillermet ◽  
...  
Keyword(s):  
Cross Section ◽  
Section Design ◽  
The Cross ◽  
Selection Of

Place Selection of Sectionalizing Units in 0.38 kV Power Networks

2021 ◽  
Vol 10 (4) ◽  
pp. 35-52
Author(s):  
Alina Vinogradova ◽  
Alexander Vinogradov ◽  
Alexey N. Vasilyev ◽  
Alexey Dorokhov ◽  
Vadim Bolshev ◽  
...  
Keyword(s):  
Cross Section ◽  
Calculated Data ◽  
Power Line ◽  
Maximum Distance ◽  
Power Lines ◽  
Power Networks ◽  
Protective Devices ◽  
The Cross ◽  
Selection Of

In the paper there is the developed methodology for selecting the installation places and number of sectionalizing units which allows solving the problem according to the criterion of providing the necessary sensitivity of the protective devices installed on the line input. The obtained expression allows calculating the maximum distance to the installation place of a sectionalizing unit. It also allows determining the need to install a sectionalizing unit in a power line. If a sectionalizing unit is installed to protect an outgoing line, the technique can also be used taking into account the adjustment of the original calculated data. The developed methodology for determining the installation place of a sectionalizing unit can be used for other purposes. For example, it allows selecting the cross section of power lines in terms of the protection sensitivity when designing power lines or when reconstructing them.

Effect of Drawing Tubes without Interoperation Recrystallization Annealing on the Orientation of Boundaries Grain - Orthogonal Direction

2013 ◽  
Vol 811 ◽  
pp. 104-107 ◽  
Author(s):  
Martin Ridzoň ◽  
Jozef Bílik ◽  
Anna Závacká
Keyword(s):  
Chemical Modification ◽  
Cross Section ◽  
Tube Wall ◽  
Cold Drawing ◽  
Recrystallization Annealing ◽  
Relative Reduction ◽  
Technological Parameters ◽  
Orthogonal Direction ◽  
Forming Tools ◽  
Selection Of

The term cold-drawing of tubes refers to forming when the final material (a tube) is formed in a pipe bell and its vertical cross-section is smaller, the tube wall is thinner or thicker and its length is greater. Steel is most commonly the final material. The forming proceeds in a few draws which depend on the final tube dimension. The selection of relative reduction for particular diameters plays an important role because an unbalanced reduction causes stress, and therefore also deformation or cracks during drawing. The technological parameters are: rolling temperature, de-burring of tube ends, the reduction, which determines the dimensions of the forming tools, the optimal chemical modification, the speed of forming on the drawbenches, and the method of tube drawing.

Erhöhung der Bauteilfestigkeit durch Gradierungspressen/Increase of component strength by gradation extrusion

2019 ◽  
Vol 109 (10) ◽  
pp. 777-778
Author(s):  
R. Selbmann
Keyword(s):  
Grain Size ◽  
Cross Section ◽  
Process Design ◽  
High Strength ◽  
Fine Grained ◽  
Component Strength ◽  
The Cross ◽  
Increasing Demand

In den letzten Jahren wurde die Forderung der Industrie nach hochfesten und zugleich duktilen Werkstoffen immer lauter. Zunehmend rückten daher Werkstoffe mit ultra-feinkörniger Mikrostruktur in den Fokus der Forschungsarbeiten. Ein Verfahren zur Erzeugung von Korngrößengradienten über den Bauteilquerschnitt stabförmiger Halbzeuge ist das Gradierungspressen. Der Beitrag erläutert das Verfahrensprinzip, beleuchtet Varianten der Verfahrensauslegung und zeigt – gestützt durch experimentelle Umformversuche – die Möglichkeiten des Gradierungspressens für die Erzeugung lokaler ultrafeinkörniger Bereiche im Werkstoff auf.   In recent years, there has been an increasing demand by the industry for high-strength and materials that are also ductile. Research has focused more an more on materials with ultra fine-grained microstructures. Gradation extrusion is a process for generating grain size gradients across the cross-section of bar-shaped semi-finished products. This article describes the process principle, presents variants of process design and – based on forming experiments – illustrates the possibilities of gradation extrusion for generating local ultra fine-grained areas in the material.

scholarly journals Operational problems of 2+1 bypass road sections

2016 ◽  
Vol 38 (2) ◽  
pp. 79-89 ◽  
Author(s):  
Marian Tracz ◽  
Mariusz Kieć
Keyword(s):  
Cross Section ◽  
Road Safety ◽  
Final Part ◽  
Traffic Performance ◽  
Operation Stage ◽  
Trunk Road ◽  
The Cross ◽  
Traffic Operation ◽  
Selection Of

The paper presents several problems of designing trunk-road bypasses of towns, which can be very helpful in improving their traffic performance. Such roads perform supplementary functions to the operation of network of motorways and express-roads constructed in Poland over the last decade. These problems include: selection of the cross section, selection and design of intersections and interchanges on bypasses, safety and traffic operation problems. The authors highlight the advantages of bypasses and point out some errors, which can be seen in the operation stage, basing on research and observation of 8 bypasses. In the paper traffic operation and road safety analyses for Zyrardow bypass are presented. The final part of the paper gives conclusions and recommendations for 2+1 bypass use and design.

The Heterogeneity of Composition and Microstructure in Cast Large Sized 3104 Alloy Slab

2012 ◽  
Vol 217-219 ◽  
pp. 349-353
Author(s):  
Rui Yin Huang ◽  
Zhi Min Yin ◽  
Yuan Zhi Zhu
Keyword(s):  
Grain Size ◽  
Grain Boundary ◽  
Aluminium Alloy ◽  
Cooling Rate ◽  
Surface Area ◽  
Cross Section ◽  
Chemical Compositions ◽  
The Cross

Heterogeneity of composition and microstructure in cast large sized 3104 aluminium alloy slab were studied using AES-ICP, OM, SEM, etc. The results show that the cooling rate on the cross section of 3104 slab is different, macro-segregation is found in the different section in the slab .The content of Ti decreases gradually from the surface to about 1/4 thickness of the slab, then increases rapidly to the center of slab; other elements content increases gradually from the surface to the about 1/4 thickness and then decreases rapidly to the center; the grain size on the surface area is fine, and the grain size at the center is coarse , segregation of Mg is found within the grains; great amount compound is found to be of presence on the grain boundary, with chemical compositions of Al 87（FeMn）13 and Al83（FeMn）12Si5; The compound size at the surface area is comparatively smaller, and coarser at the centre of slab.

Selection of the Cross Section for a Composite T-Beam

1957 ◽  
Vol 83 (4) ◽  
Author(s):  
R. S. Fountain ◽  
I. M. Viest
Keyword(s):  
Cross Section ◽  
The Cross ◽  
T Beam ◽  
Selection Of

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

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