Results 241 to 250 of about 512,239 (311)

Nanoindentation creep behavior and its relation to activation volume and strain rate sensitivity of nanocrystalline Cu

Materials Science & Engineering: A, 2019
The creep behavior of nanocrystalline Cu with an average grain size of 25 nm was investigated by nanoindentation test at room temperature. Using the creep strain rate versus creep stress data obtained at different loading rates, the activation volume and
Weiming Sun, Yue Jiang, G. Sun, Jiangjiang Hu, T. Zhou, Zhonghao Jiang, J. Lian   +6 more
semanticscholar   +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

Strain-rate sensitivity index of thermoplastics

Journal of Materials Science, 1993
Strain-rate sensitivity index, m, values of several thermoplastics (HDPE, PP, PMMA, PS, PVC, PC, and PA) were determined at ambient temperature by both variable strain-rate and stressrelaxation methods. Specimens were loaded in tension in the elastic portion of the stress-strain curve at various strain rates and the load was recorded as a function of ...
D. L. Goble, E. G. Wolff
openaire   +1 more source

Global and local strain rate sensitivity of commercially pure titanium

Journal of Alloys and Compounds, 2019
We have performed macroscopic tensile and nanoindentation tests to investigate the effect of oxygen content on the global and local strain rate sensitivity of grades 1, 2 and 4 commercially pure titanium (CP–Ti).
Min-su Lee, Y. Hyun, T. Jun
semanticscholar   +1 more source

Deformation mechanisms and strain rate sensitivity of bimodal and ultrafine-grained copper

, 2020
Materials with ultrafine grain size in the range from 100 nm to 1 µm exhibit very high strength paired with a satisfactory ductility when compared to their coarse grained (CG) counterparts.
J. Bach, M. Stoiber, L. Schindler, H. Höppel, M. Göken   +4 more
semanticscholar   +1 more source

Development of equations for strain rate sensitivity of UFG aluminum as a function of strain rate

International Journal of Plasticity, 2017
Abstract Strain rate sensitivity ( m -value) of ultrafine grain (UFG) AA 1050 and AA 5052 sheets processed by accumulative roll-bonding is investigated versus strain rate by stress relaxation (SR) test at ambient temperature. The results show a weak viscous nature of deformation for AA 5052 specimens as compared to AA 1050 ones.
Mohammad Sadegh Mohebbi, Abbas Akbarzadeh   +1 more
openaire   +1 more source

Modeling the temperature and high strain rate sensitivity in BCC iron: Atomistically informed multiscale dislocation dynamics simulations

International journal of plasticity, 2019
Multiscale discrete dislocation plasticity (MDDP) simulations are carried out to investigate the mechanical response and microstructure evolution of single crystal BCC iron subjected to high strain rate compression over a wide range of temperature.
Pascale El Ters, M. Shehadeh
semanticscholar   +1 more source

Strain rate sensitivity of a novel refractory high entropy alloy: Intrinsic versus extrinsic effects

Materials Science & Engineering: A, 2019
In recent years, there is great interest in development of “reduced activity” refractory alloys for next generation nuclear applications for safe and efficient post-service recycling.
Maryam Sadeghilaridjani, Saideep Muskeri, V. Hasannaeimi, M. Pole, S. Mukherjee   +4 more
semanticscholar   +1 more source

Strain-rate sensitivity of glasses

2017
Although glasses are commonly thought of as ideal brittle materials, a local plastic deformation can be induced by the penetration of sharp objects, such as the indenter tips commonly employed for hardness testing. Since the first experimental verification of this phenomenon, considerable research effort has been devoted to the underlying microscopic ...
openaire   +1 more source

CONSTITUTIVE MODELLING OF STRAIN RATE SENSITIVITY

1993
Conventional treatment of strain rate sensitivity measurements from strain change tests involving graphical method is examined. The resultant strain rate sensitivity was found to depend strongly on the magnitude of the change in crosshead velocity. Furthermore, the graphical method is unable to account for the instantaneous strain rate sensitivity ...
C.P. Ling, P.G. McCormick
openaire   +1 more source