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Topic: Ductility

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In the News (Tue 23 Apr 19)

  Ductility - Wikipedia, the free encyclopedia
Ductility is the physical property of being capable of sustaining large plastic deformations without fracture (in metals, such as being drawn into a wire).
A ductile material is any material that yields under shear stress (as opposed to brittle fracture, which yields under normal stress).
In glacial ice this zone is at approximately 30 metres depth.
en.wikipedia.org /wiki/Ductility   (352 words)

 News Item: Pure Copper Six Times Stronger than Normal, with No Loss in Ductility
The reduction in grain size is responsible for the increase in strength, with an increasing number of grain boundaries hindering the movement of dislocations.
Ductility was introduced into the material by inducing abnormal or non-uniform grain growth, which resulted in approximately 20-25% of the grains growing to a larger size, producing a bimodal grain size distribution.
The combination of very small and large grains gives the material its strength and ductility properties, which is important in the forming and processing of high strength copper components.
www.azom.com /details.asp?ArticleID=1766   (421 words)

 Nonlinear Analysis of Uniform Building Code
1 and 3, it is found that large ductility is not necessary a key factor of damage because the largest ductility may occur only in one or few cycles of vibration.
Compared with the cumulative plastic ductility, hysteresis energy combines the effect of member force and plastic deformation such as material deterioration caused force degradation is considered automatically.
1, 4 and 5, the correlation between damage distribution, cumulative ductility and hysteresis energy is not strong.
www.ce.berkeley.edu /~epp/kyoto/node4.html   (576 words)

 ductility — FactMonster.com
ductility, ability of a metal to plastically deform without breaking or fracturing, with the cohesion between the molecules remaining sufficient to hold them together (see
Ductility is important in wire drawing and sheet stamping.
Ductility is a focus of rheology, the study of how materials deform and flow in response to force.
www.factmonster.com /ce6/sci/A0816232.html   (161 words)

 Lloyd Instruments - Ductility Testing
With a ductile fracture, there is a considerable amount of plastic deformation prior to failure.
Ductile materials show a measured amount of plastic deformation prior to fracture.
Ductility testing can be carried out on a range of Lloyd Instruments materials testing machines together with NEXYGEN™ MT data analysis software when more comprehensive testing results are required.
www.lloyd-instruments.co.uk /testtypes/ductility.cfm   (128 words)

 Explaining Ductility Loss in Steam-Sterilized Polycarbonate (MPB archive, May 96)
The scattering of the ductility data for the lowest-molecular-weight sample MW-1 is enormous, as shown in Figure 3.
As shown in Figure 5, all specimens were broken in ductile mode and the elongation-at-break data have higher values and are very consistent and uniform.
As a result, the polycarbonate relaxes and separates from the particle interface, enabling the specks to act as seeds for the radial propagation of cracks that become the weakest physical link when the part is subjected to mechanical stress or impact.
www.devicelink.com /mpb/archive/96/05/001.html   (2022 words)

 Ductility (via CobWeb/3.1 planet03.csc.ncsu.edu)   (Site not responding. Last check: 2007-11-06)
Ductility of reinforcing steel may be regarded as its ability to undergo plastic deformation.
Agt, which is the percentage total elongation at maximum force, is that measure of elongation which excludes that considerable and highly localised extension of the steel under test in the area of plastic instability adjacent to the point of fracture.
Agt is therefore considered as a more useful measure of ductility for use in design applications for concrete structures.
www.ukcares.co.uk.cob-web.org:8888 /agt.htm   (185 words)

 Scaling of ductility and damage-based strength reduction factors for horizontal motions   (Site not responding. Last check: 2007-11-06)
Ductility factor, also known as strength reduction factor (SRF), is considered to primarily depend on the initial time period of the single-degree-of-freedom (SDOF) oscillator and the displacement ductility demand ratio for the ground motion.
Since the ductility demand ratio is not a complete measure of the cumulative damage in the structure during the earthquake-induced vibrations, the existing definition of the SRF is sought to be modified with the introduction of damage-based SRF (in place of ductility-based SRF).
Through a parametric study on ductility-based SRFs, it has been shown that the hitherto assumed insensitivity of earthquake magnitude and strong motion duration may not be always justified and that the initial time period of the oscillator plays an important role in the dependence of SRF on these parameters.
home.iitk.ac.in /~vinaykg/pap46.htm   (320 words)

 Ductility of Seals (via CobWeb/3.1 planet03.csc.ncsu.edu)   (Site not responding. Last check: 2007-11-06)
Being able to predict ductility and strain are important in risking seal.
A shale with a density of 1.2 g/cm3 is more ductile than a shale at 14,000 feet with a density of 2.6 g/cm3.
Ductility, in percent, has been contoured in color with the most ductile shales in purple and the most brittle shales in red.
www.sealsinternational.com.cob-web.org:8888 /ductility.htm   (302 words)

 Polyetherimide resin compositions with improved ductility - Patent 6011122
A method for improving the dart impact strength, ductility, or dart impact strength and ductility when measured at -30.degree.
The thermoplastic resin compositions of the present invention exhibit high heat distortion temperature, improved room temperature impact properties and improved impact strength and ductility at low temperatures, compared to the linear polycarbonate resin-containing resin blends of the '483 patent.
Polyetherimide resins suitable for use as component (a) of the thermoplastic resin of the composition of the present invention are known compounds whose preparation and properties have been described, see generally, U.S. Pat.
www.freepatentsonline.com /6011122.html   (2393 words)

 Headlines@Hopkins: Johns Hopkins University News Releases
This change in strength occurred because of the reduction in grain size to a level similar to that of nanocrystalline materials, which are defined as materials with grain sizes less than about 100 nanometers.
According to the researchers, this final mix of ultra fine grains and larger ones, described as a "bimodal distribution," is what gave the new copper its coexisting high strength and ductility.
Next, the researchers plan to test their process with other pure metals as well as metal alloys, which are widely used in manufacturing, to see if it produces the same change in mechanical properties.
www.jhu.edu /news_info/news/home02/oct02/copper.html   (880 words)

 Alloy, Metal Terminology (D)
Heating metal to above the critical range and appropriately cooling to develop the greatest possible commercial softness or ductility.
Steel, normally made in the basic open-hearth furnace or by the basic oxygen process with carbon less than 0.10% and manganese in the 0.20-0.50% range, completely annealed.
In steel, ductility is usually measured by elongation and reduction of area as determined in a tensile test.
www.metal-mart.com /Dictionary/dictletd.htm   (536 words)

 B490-92(1998) Standard Practice for Micrometer Bend Test for Ductility of Electrodeposits
A change in ductility value can be used as an indication of possible changes in the electroplating solution.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Bend testing-coatings; electrodeposited foils-ductility, by micrometer bend method, practice,; Ductility; ductility of electrodeposits, micrometer test,; Electrodeposited coatings; ductility, of electrodeposited foils, by micrometer bend test,; practice,; Foil; electrodeposited, ductility by micrometer bend test, practice,; Micrometer bend test; ductility of electrodeposited foils, practice; 17.040.20; 25.220.40
www.astm.org /DATABASE.CART/HISTORICAL/B490-92R98.htm   (211 words)

 K80020 Constant Temperature Ductility Machine
Standard Ductility Testing Machine – Three-speed apparatus pulls briquets of bituminous materials apart at a uniform speed while immersing them in water.
Constant Temperature Model – Similar to the standard Ductility Machine, but equipped with a solid state, thermostatically controlled bath and circulator to control temperature within ± 0.9°F (±0.5°C) in the range of 35-90°F (1.7-32.2°C).
Circulant water is directed through stainless steel tubes beneath a false bottom in the trough to provide efficient heat transfer.
www.koehlerinstrument.com /products/K80020.html   (309 words)

 Ductility Testing Machines,Ductility Testing Equipments,Ductility Machines Exporter (via CobWeb/3.1 ...   (Site not responding. Last check: 2007-11-06)
We are exporter, manufacturer and supplier of Ductility Testing Machines.
The machine is used for determining the ductility of asphaltic bitumen and fluxed native asphalt cutback bitumen and blown type bitumen.
Complete with three moulds and plates supplied mounted on the apparatus suitable for operation on 230 Volts.
www.testing-machines-equipment.com.cob-web.org:8888 /ductility-testing-machines.html   (112 words)

 K84000 Automatic Ductility of Bituminous Materials
The Automatic Tensile Stress Apparatus measures the ductility of bituminous materials immersed in water on up to three samples simultaneously.
An RS-232 interface provides test data export to an external printer, and a Ductility Windows® Software Package is available for data graphing, manipulation, and storage.
For the determining the tensile properties of polymer-modified bitumens, an elastic recovery test method according to ASTM P226 is also available on the Automatic Tensile Stress Apparatus.
www.koehlerinstrument.com /products/K84000.html   (170 words)

 ductility - OneLook Dictionary Search
Tip: Click on the first link on a line below to go directly to a page where "ductility" is defined.
Ductility : Online Plain Text English Dictionary [home, info]
Ductility : A to Z of Terms related to the Thermal Spray Process and Surface Engineering [home, info]
www.onelook.com /?w=ductility   (169 words)

 CiteULike: Tag ductility   (Site not responding. Last check: 2007-11-06)
posted to ductility flexible-electronics localization macroelectronics mechanics modeling polymer-substrate simulation stretchability thin-metal-film by Macroelectronics as
posted to ductility flexible-electronics localization macroelectronics mechanics modeling polymer-substrate simulation thin-metal-film by Macroelectronics as
High ductility of a metal film adherent on a polymer substrate
www.citeulike.org /tag/ductility   (102 words)

 Ductility - Definitions from Dictionary.com (via CobWeb/3.1 planet03.csc.ncsu.edu)   (Site not responding. Last check: 2007-11-06)
Ductility - Definitions from Dictionary.com (via CobWeb/3.1 planet03.csc.ncsu.edu)
Perform a new search, or try your search for "Ductility" at:
HighBeam Research - 32 million documents from leading publications
dictionary.reference.com.cob-web.org:8888 /search?q=Ductility   (135 words)

 [No title]   (Site not responding. Last check: 2007-11-06)
Effect of Site Distance on Median Ductility Demand Spectra¡>>b$ª= ó'Ÿ¨33.
Effect of TEC on Median Ductility Demand Spectra¡64b$j$çÿ$b$ª3 ó.‡Ÿ¨33.
Distance to a site from a ruptured fault, epicenter, or hypocenter 3.
www.lehigh.edu /~cys4/NCEEv2.ppt   (567 words)

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