Results 211 to 220 of about 517,545 (268)

Strain hardening, strain rate sensitivity, and ductility of nanostructured metals

Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2004
This paper presents an overview of the strain hardening and strain rate hardening behavior of nanostructured and ultrafine-grained metals. The experimental findings obtained in our laboratory are summarized, with some recent data for ultrafine-grained Cu presented as a model case.
Y.M. Wang, E. Ma
exaly   +2 more sources

Strain hardening rate sensitivity and strain rate sensitivity in TWIP steels

Materials Science and Engineering: A, 2015
Abstract TWIP steels are materials with very high strength and exceptional strain hardening capability, parameters leading to large energy absorption before failure. However, TWIP steels also exhibit reduced (often negative) strain rate sensitivity (SRS) which limits the post-necking deformation.
Bintu, A, Vincze, G, Picu, CR, Lopes, AB, Gracio, JJ, Barlat, F   +5 more
openaire   +3 more sources

On rate sensitivity of f.c.c. metals, instantaneous rate sensitivity and rate sensitivity of strain hardening

Journal of the Mechanics and Physics of Solids, 1986
Abstract A n up-to-date approach to the phenomenon of rate sensitivity observed in f.c.c. metals is discussed. It is shown that the rate sensitivity of strain hardening, which so far has been neglected, plays an equal or even dominant role in an estimation of the total rate sensitivity.
J.R. Klepaczko, C.Y. Chiem
openaire   +1 more source

On serrated yielding and negative on strain-rate sensitivity

The Chemical Engineering Journal, 1966
Abstract Negative strain-rate sensitivity is shown to be a common feature in a variety of materials provided test conditions are chosen such that serrated yielding (the Portevin-Le Chatelier effect) occurs. An instability is shown to exist in the dislocation velocity ( v )- stress (τ) relation, which leads to negative values of ∂ log τ ∂
B.A. Wilcox, A.R. Rosenfield
openaire   +1 more source

Strain rate sensitivity of flow stress at large strains

Acta Materialia, 1998
Measurements of the strain rate sensitivity of flow stress are critically assessed. Results depend on strain and on the range of strain rates employed. Changes in strain hardening and transients in the flow stress are discussed.
H.P. Stüwe, P. Les
openaire   +1 more source

Strain-rate sensitivity and effects of strain rate in sheet forming

Metals Technology, 1980
AbstractThe strain-rate dependencies of flow strength and strain-hardening behaviour are particularly important in sheet-forming operations because they influence strain distribution and necking resistance. Measurements made in uniaxial and biaxial tensile tests on low-carbon steels have shown that strain-rate sensitivity is a function of both strain ...
openaire   +1 more source

Strain Rate Sensitivity of Automotive Steels

SAE Technical Paper Series, 1992
<div class="htmlview paragraph">Strain rate sensitivity is an important material property in the formability of sheet metal. In this study, strain rate sensitivity is evaluated for several different grades of steel. Strain rate sensitivity varies from 0.01 to 0.022 for the steels tested.
Ming F. Shi, David J. Meuleman
openaire   +1 more source

Strain Rate Sensitivity of Flow Stress at Very High Rates of Strain

1996
In order to clarify the mechanism of the steep rise in the flow stress, widely seen in metallic materials at strain rates above about 5×103/sec, two strain rate change tests were conducted. The strain rate reduction test was made for polycrystalline aluminium, copper, iron and niobium at strain rates up to about 2×104/sec.
J. Shioiri, K. Sakino, S. Santoh
openaire   +1 more source

Strain rate sensitivity of toughened epoxy

Iranian Polymer Journal, 2015
The high strain rate behaviour of toughened epoxy is explored under compressive loadings. A cycloaliphatic epoxy was toughened using different types of preformed fillers: epoxy-coated elastomeric poly(dimethylsiloxane) (CSR) and thermoplastic polystyrene microspheres.
Saurabh Chaudhary, Nahid Iqbal, Vikas Mangla, Devendra Kumar, Prasun Kumar Roy   +4 more
openaire   +1 more source

Strain rate sensitivity of hydroxyapatite coatings

Thin Solid Films, 2011
Abstract The strain-rate sensitivity of strength is a significant factor to evaluate the deformation mode of crystalline materials. The strain rate sensitivity of hardness is experimentally investigated here for hydroxyapatite coatings that are sputter deposited onto titanium-coated silicon wafers. These biocompatible HA coatings can provide a strong,
H.S. Tanvir Ahmed, Alan F. Jankowski
openaire   +1 more source