Influence of deformation by rolling on the mechanical properties of 36NKhTYu alloy

1989 ◽  
Vol 31 (10) ◽  
pp. 773-775
Author(s):  
G. V. Seregin ◽  
V. V. Murav'ev
Keyword(s):  
Mechanical Properties ◽  
36Nkhtyu Alloy ◽  
Deformation By Rolling

Structure and mechanical properties of titanium subjected to high-rate channel angular pressing and deformation by rolling

2011 ◽  
Vol 111 (4) ◽  
pp. 421-429 ◽  
Author(s):  
V. I. Zel’dovich ◽  
E. V. Shorokhov ◽  
S. V. Dobatkin ◽  
N. Yu. Frolova ◽  
A. E. Kheifets ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Rate ◽  
Angular Pressing ◽  
Deformation By Rolling

Recrystallization Deformation of Austenite, Microstructure of Martensite and Property of Rolled Steel Products

2007 ◽  
Vol 558-559 ◽  
pp. 363-367
Author(s):  
A. Traino ◽  
A. Baschenko ◽  
Vadim Ivoditov ◽  
A. Zavrazhnov ◽  
V. Knokhin
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Rolled Stock ◽  
Rolled Steel ◽  
Hot Plastic Deformation ◽  
Technological Processes ◽  
Alloying System ◽  
Deformation By Rolling

Novel technological processes for conceptually new integrated deformation-thermal production of flat rolled stock with enhanced physical-mechanical properties and minimized alloying system have been devised on the basis of recently discovered metallophysical laws of influence, through hot plastic deformation by rolling, upon microstructure-phase conversions and states of steel in metallurgical products.

scholarly journals CHANGES IN PIPE GEOMETRY DURING SEQUENTIAL CREATION OF STRESSES ON THE INNER SURFACE UNDER EXTERNAL THERMOMECHANICAL EFFECTS

2019 ◽  
Vol 62 (10) ◽  
pp. 816-821
Author(s):  
I. V. Chumanov ◽  
A. V. Kozlov ◽  
M. A. Matveeva
Keyword(s):  
Mechanical Properties ◽  
Outer Side ◽  
High Tech ◽  
Strength Increase ◽  
Structure And Properties ◽  
Flexible Pipe ◽  
Depth Analysis ◽  
Thermomechanical Method ◽  
Pipe Geometry ◽  
Deformation By Rolling

In  modern  high-tech  industry,  flexible  pipe  technology  is  widely used. Pipe benders are an integral part of pipeline systems.  The most widely used are methods of pipes cold bending, which are  accompanied by a number of negative phenomena – such as reduction in the crackle of the wall on outer side of the bend, ovalization  of the cross section and formation of bumps. The article presents a  study of influence of deformation technology of pipe billets by rolling with high tension on the structure and properties of the billet’s  material. The method of pipe deformation by rolling with tension  allows obtaining radial bending of the billet without its destruction  and without causing obvious defects of the surface and microstructure. The tests were carried out on the samples from steel of 3sp and  12Kh18N10T grades. Research of the microstructure was performed  in  accordance  with  GOST  5639  –  82,  of  mechanical  properties  –  with GOST  1397  –  84, of microhardness  – with GOST  9450  –  76.  The article examines the effect of changes in geometry of the pipe  billet on its structure and properties. The process of pipe deformation  by rolling leads to changes in the mechanical properties of the tested  materials. The values   of micro hardness and strength increase, while  the grain points decrease. In the process of deformation, it is possible  to change the microstructure of the material as a result of structural  transformations (quenching). In the thermomechanical method of deformation, plastic flow of metal suggests possible change in structure  of pipe walls as a result of recrystallization and heat treatment of material of the bend area. Therefore, it requires further study and more  in-depth analysis of this technology.

scholarly journals Эволюция структуры и свойств сплава Ni-=SUB=-47-=/SUB=-Mn-=SUB=-42-=/SUB=-In-=SUB=-11-=/SUB=- после пластической деформации

2019 ◽  
Vol 61 (11) ◽  
pp. 2204
Author(s):  
Ю.В. Калетина ◽  
Е.Д. Грешнова ◽  
А.Ю. Калетин
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
High Pressure ◽  
Magnetic Susceptibility ◽  
Severe Plastic Deformation ◽  
Room Temperature ◽  
Nanocrystalline Structure ◽  
Physical And Mechanical Properties ◽  
Coarse Grain ◽  
Deformation By Rolling

AbstractResults of the study of the effect of various types of plastic deformation on microstructural features and change in physical and mechanical properties of the nonstoichiometric Heusler alloy Ni_47Mn_42In_11 are shown. It was demonstrated that the deformation by rolling and upsetting leads to an increase in the microhardness and to an embrittlement of the investigated alloy. Severe plastic deformation by torsion under high pressure of 8 GPa at room temperature was found to strongly refine initially coarse grain and to contribute to the formation of a nanocrystalline structure with grain fragments up to 10 nm. In this case, the fraction of viscous constituent on the fracture and the microhardness increased, while the magnetic susceptibility decreased.

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

Lattice Imaging of Grain Boundaries in Ceramics

1977 ◽  
Vol 35 ◽  
pp. 114-115
Author(s):  
D. R. Clarke ◽  
G. Thomas
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Grain Boundaries ◽  
High Temperature Strength ◽  
Current Interest ◽  
Lattice Imaging ◽  
Special Significance ◽  
Structural Applications ◽  
Refractory Ceramics

Grain boundaries have long held a special significance to ceramicists. In part, this has been because it has been impossible until now to actually observe the boundaries themselves. Just as important, however, is the fact that the grain boundaries and their environs have a determing influence on both the mechanisms by which powder compaction occurs during fabrication, and on the overall mechanical properties of the material. One area where the grain boundary plays a particularly important role is in the high temperature strength of hot-pressed ceramics. This is a subject of current interest as extensive efforts are being made to develop ceramics, such as silicon nitride alloys, for high temperature structural applications. In this presentation we describe how the techniques of lattice fringe imaging have made it possible to study the grain boundaries in a number of refractory ceramics, and illustrate some of the findings.

Electron Microscopic Observation of the Longitudinal Organization of Poly (p-Phenylene Terephthalamide) Fibers

1982 ◽  
Vol 40 ◽  
pp. 680-681
Author(s):  
Li Li-Sheng ◽  
L.F. Allard ◽  
W.C. Bigelow
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Microscopic Observation ◽  
Electron Microscopic Observation ◽  
Electron Microscopic ◽  
Aromatic Polyamides ◽  
Radial Arrangement ◽  
Scanning Electron ◽  
Better Than

The aromatic polyamides form a class of fibers having mechanical properties which are much better than those of aliphatic polyamides. Currently, the accepted morphology of these fibers as proposed by M.G. Dobb, et al. is a radial arrangement of pleated sheets, with the plane of the pleats parallel to the axis of the fiber. We have recently obtained evidence which supports a different morphology of this type of fiber, using ultramicrotomy and ion-thinning techniques to prepare specimens for transmission and scanning electron microscopy.

Mechanical Properties and Dislocation Structure of Single Crystal Cdte Deformed in Compression at 300°C

1976 ◽  
Vol 34 ◽  
pp. 592-593
Author(s):  
Ernest L. Hall ◽  
J. B. Vander Sande
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Dislocation Structure ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Strain Curve ◽  
Optical Devices ◽  
Semiconductor Compound ◽  
Wide Range ◽  
Sample Orientation

The present paper describes research on the mechanical properties and related dislocation structure of CdTe, a II-VI semiconductor compound with a wide range of uses in electrical and optical devices. At room temperature CdTe exhibits little plasticity and at the same time relatively low strength and hardness. The mechanical behavior of CdTe was examined at elevated temperatures with the goal of understanding plastic flow in this material and eventually improving the room temperature properties. Several samples of single crystal CdTe of identical size and crystallographic orientation were deformed in compression at 300°C to various levels of total strain. A resolved shear stress vs. compressive glide strain curve (Figure la) was derived from the results of the tests and the knowledge of the sample orientation.

TEM Studies of Grain Boundary Films in Si3N4 Ceramics

1991 ◽  
Vol 49 ◽  
pp. 930-931
Author(s):  
H.-J. Kleebe ◽  
J.S. Vetrano ◽  
J. Bruley ◽  
M. Rühle
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Hot Isostatic Pressing ◽  
Amorphous Film ◽  
Liquid Phase Sintering ◽  
Second Phase ◽  
High Temperature Mechanical Properties ◽  
Triple Points ◽  
Boundary Films

It is expected that silicon nitride based ceramics will be used as high-temperature structural components. Though much progress has been made in both processing techniques and microstructural control, the mechanical properties required have not yet been achieved. It is thought that the high-temperature mechanical properties of Si3N4 are limited largely by the secondary glassy phases present at triple points. These are due to various oxide additives used to promote liquid-phase sintering. Therefore, many attempts have been performed to crystallize these second phase glassy pockets in order to improve high temperature properties. In addition to the glassy or crystallized second phases at triple points a thin amorphous film exists at two-grain junctions. This thin film is found even in silicon nitride formed by hot isostatic pressing (HIPing) without additives. It has been proposed by Clarke that an amorphous film can exist at two-grain junctions with an equilibrium thickness.

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