Plastic flow in binary substitutional alloys of BCC iron-effects of wire drawing and alloy content on work hardening and ductility

1972 ◽  
Vol 3 (7) ◽  
pp. 1843-1849 ◽  
Author(s):  
G. Langford ◽  
P. K. Nagata ◽  
R. J. Sober ◽  
W. C. Leslie
Keyword(s):  
Plastic Flow ◽  
Work Hardening ◽  
Wire Drawing ◽  
Alloy Content ◽  
Bcc Iron ◽  
Substitutional Alloys

A Law of Work-Hardening

1948 ◽  
Vol 15 (3) ◽  
pp. 265-273
Author(s):  
A. M. Freudenthal ◽  
M. Reiner
Keyword(s):  
Mild Steel ◽  
Work Hardening ◽  
Wire Drawing ◽  
Total Work ◽  
Exponential Functions ◽  
Recoverable Strain ◽  
Annealed State ◽  
Logarithmic Measure ◽  
Work Of Deformation ◽  
Crystalline Metal

Abstract Based on the “blocking” theory of the strength of a poly-crystalline metal, a law of work-hardening is derived and checked experimentally on mild steel deformed by wire-drawing up to a deformation of 4.6 in the logarithmic measure. The law correlates the recoverable strain work with the total work of deformation in a series of exponential functions, the number of which corresponds to the number of sizes of crystal grains present in the annealed state.

Influence of the Preforming Material State in Common Tribological Tests

2016 ◽  
Vol 1140 ◽  
pp. 75-82
Author(s):  
Bastian Zimmermann ◽  
Marion Merklein
Keyword(s):  
Compression Test ◽  
Work Hardening ◽  
Test Sample ◽  
Wire Drawing ◽  
Cold Forging ◽  
The Real ◽  
Friction Factors ◽  
Ring Compression ◽  
Material State ◽  
Rolled Wire

Different tests to determine friction factors for cold forging processes are given in the literature. The double cup extrusion test, the ring compression test and the T-shape compression test are three of the common tests, which are compared in this investigation. From former investigations it is known that there is an influence of the work-hardening of the test sample on the friction factor, which is determined by the test. At this study, the influence of the work-hardening of the material on the three named tests is investigated by using a wire drawing process. In addition, the drawn wire from the originally thermo mechanical rolled wire is also annealed to have a second material state without any work-hardening. The used material and its numerical modelling as well as the analyzed tribological conditions of the real specimens are described. Afterwards the three test setups are explained for the numerical as well as for the real experiments. In the end, the influence of the drawing respectively the work-hardening for the three tests is presented and discussed.

Plastic Flow Localization Viewed as an Auto-Wave Process Generated in Deforming Metals

2011 ◽  
Vol 172-174 ◽  
pp. 1279-1283 ◽  
Author(s):  
Lev Zuev ◽  
Svetlana A. Barannikova
Keyword(s):  
Plastic Flow ◽  
Work Hardening ◽  
Wave Process ◽  
Detailed Comparison ◽  
Wave Number ◽  
Flow Localization ◽  
Macro Scale ◽  
Quantitative Characteristics ◽  
Flow Phenomena ◽  
Scale Levels

The localized plastic flow auto-waves observed for the stages of easy glide and linear work hardening in a number of metals are considered. The propagation rates were determined experimentally for the auto-waves in question with the aid of focused-image holography. The dispersion relation of quadratic form derived for localized plastic flow auto-waves and the dependencies of phase and group rates on wave number are discussed. A detailed comparison of the quantitative characteristics of phase and group waves has revealed that the two types of wave observed for the stages of easy glide and linear work hardening are closely related. An invariant is introduced for localized plastic flow phenomena occurring on the micro- and macro-scale levels in the deforming solid.

High-Range Plasticity of Metals Beyond Normal Work-Hardening

1959 ◽  
Vol 81 (2) ◽  
pp. 178-181 ◽  
Author(s):  
E. V. Crane ◽  
W. S. Wagner
Keyword(s):  
Work Hardening ◽  
Wire Drawing ◽  
Tensile Failure ◽  
Cold Extrusion ◽  
Range Data ◽  
Plastic Range ◽  
Testing Technique ◽  
Technical Data ◽  
Normal Work ◽  
High Range

Metals, plastically worked for mass-production purposes are shown to have a little known and potentially valuable “high” working range, primarily compressive and substantially beyond commonplace practices and physicals. This “high range” lies beyond the point of normal tensile failure. It is distinguished by a steeper or more rapid rate of work-hardening. While some use has been made of it, to advantage, in wire-drawing, rolling, cold extrusion, and shell drawing, inadequate technical data concerning it may be attributed to unfamiliarity with the testing program. To provide pressed-metal engineering with the extended plastic-range data needed for planning operation sequences, a testing technique is outlined, which if not new, is at least unfamiliar and potentially useful until a better method is devised.

Friction Characteristics of Sliding Surfaces Undergoing Subsurface Plastic Flow

1960 ◽  
Vol 82 (2) ◽  
pp. 342-345 ◽  
Author(s):  
Milton C. Shaw ◽  
Abraham Ber ◽  
Pierre A. Mamin
Keyword(s):  
Plastic Flow ◽  
Metal Cutting ◽  
Sliding Friction ◽  
Test Procedure ◽  
Wire Drawing ◽  
Simple Test ◽  
Bulk Metal ◽  
Friction Characteristics ◽  
Sliding Surfaces ◽  
Coefficient Of Sliding Friction

It is well known that the load of an ordinary friction slider is supported by a large number of surface asperities having a collective area that is small compared with the apparent area of contact. The metal in bulk beneath such surface asperities is elastically loaded. In many metalworking operations, such as wire drawing, extruding, rolling, and metal cutting, the bulk metal undergoes plastic deformation as sliding occurs. The influence of this subsurface flow upon the coefficient of sliding friction is discussed. A simple test procedure for studying the friction characteristics of sliding metal surfaces, one of which is being subjected to plastic flow in bulk, is described, and representative data are presented for both dry and lubricated sliding.

Plastic Deformation when Cutting into an Inclined Plane

1967 ◽  
Vol 9 (1) ◽  
pp. 1-10 ◽  
Author(s):  
W. B. Palmer
Keyword(s):  
Plastic Deformation ◽  
Plastic Flow ◽  
Work Hardening ◽  
Slip Line ◽  
Inclined Plane ◽  
Line Field ◽  
Hardening Material ◽  
Slip Line Field ◽  
Theory Of Plasticity

Plastic flow and tool forces were observed as an orthogonal tool cut slowly into an inclined plane of En 9 steel. A slip-line field is constructed which represents the observed flow, and on the basis of the theory of plasticity for work-hardening material estimates of stress are consistent with observed tool forces.

Enabling Ultrahigh Plastic Flow and Work Hardening in Twinned Gold Nanowires

Nano Letters ◽  
2009 ◽  
Vol 9 (4) ◽  
pp. 1517-1522 ◽  
Author(s):  
Chuang Deng ◽  
Frederic Sansoz
Keyword(s):  
Plastic Flow ◽  
Work Hardening ◽  
Gold Nanowires

The effect of strain rate on the plastic flow characteristics of steel and aluminium sheet

1966 ◽  
Vol 1 (5) ◽  
pp. 439-446 ◽  
Author(s):  
A N Bramley ◽  
P B Mellor
Keyword(s):  
Strain Rate ◽  
Uniaxial Tension ◽  
Plastic Flow ◽  
Work Hardening ◽  
Sheet Steel ◽  
Flow Characteristics ◽  
Strain Rates ◽  
Plastic Strains ◽  
Aluminium Sheet

Work-hardening characteristics for sheet steel and aluminium have been obtained experimentally over a range of strain rates from 10−4 to 102/s. Use of the diaphragm test enables work-hardening characteristics to be obtained to much higher plastic strains than is possible in uniaxial tension. Results for killed steel show that the slope of the work-hardening characteristics decreases with increase in strain rate. Tentative extrapolation of the results suggests that if similar tests could be carried out at a strain rate of 104 then the work hardening characteristic would be that of an ideally plastic solid. In the case of aluminium the above phenomenon is not so marked and it is not possible to make even a tentative extrapolation to higher strain rates.

Sign in / Sign up

Export Citation Format

Share Document