scholarly journals Breathing mode vibrations and elastic properties of single-crystal and penta-twinned gold nanorods

2016 ◽  
Vol 18 (32) ◽  
pp. 22590-22598 ◽  
Author(s):  
Yong Gan ◽  
Zheng Sun ◽  
Zhen Chen
Keyword(s):  
Single Crystal ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Gold Nanorods ◽  
Breathing Mode

Continuum simulations using bulk elastic constants could well predict the breathing periods of crystalline gold nanorods.

Elastic Properties of L10-Ordered Single Crystals

2007 ◽  
Vol 26-28 ◽  
pp. 221-224 ◽  
Author(s):  
C. Wang ◽  
Katsushi Tanaka ◽  
Kyosuke Kishida ◽  
Haruyuki Inui
Keyword(s):  
Single Crystal ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Elastic Anisotropy ◽  
Axial Ratio ◽  
Spectroscopy Technique ◽  
Complete Set

The temperature dependence of single-crystal elastic constants of L10-ordered single-crystals of FePd . A complete set of elastic constants has been determined with the resonance ultrasound spectroscopy technique. The compounds clearly show a tetragonal elastic anisotropy, c11 < c33 and c44 < c66. The temperature dependencies of the anisotropies are not simply explained by the variation of axial ratio (c/a) of the crystal.

scholarly journals Investigation of Elastic Properties of the Single-Crystal Nickel-Base Superalloy CMSX-4 in the Temperature Interval between Room Temperature and 1300 °C

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 152
Author(s):  
Alexander Epishin ◽  
Bernard Fedelich ◽  
Monika Finn ◽  
Georgia Künecke ◽  
Birgit Rehmer ◽  
...  
Keyword(s):  
Single Crystal ◽  
Elastic Properties ◽  
Temperature Interval ◽  
Elastic Constants ◽  
Gas Turbines ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Resonance Frequencies ◽  
Nickel Base ◽  
Base Superalloy

The elastic properties of the single-crystal nickel-base superalloy CMSX-4 used as a blade material in gas turbines were investigated by the sonic resonance method in the temperature interval between room temperature and 1300 °C. Elastic constants at such high temperatures are needed to model the mechanical behavior of blade material during manufacturing (hot isostatic pressing) as well as during technical accidents which may happen in service (overheating). High reliability of the results was achieved using specimens of different crystallographic orientations, exciting various vibration modes as well as precise measurement of the material density and thermal expansion required for modeling the resonance frequencies by finite element method. Combining the results measured in this work and literature data the elastic constants of the γ- and γ′-phases were predicted. This prediction was supported by measurement of the temperature dependence of the γ′-fraction. All data obtained in this work are given in numerical or analytical forms and can be easily used for different scientific and engineering calculations.

scholarly journals Elastic Properties of Polycrystals: A Review

1990 ◽  
Vol 12 (1-3) ◽  
pp. 1-14 ◽  
Author(s):  
S. Hirsekorn
Keyword(s):  
Single Crystal ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Polycrystalline Materials ◽  
Effective Elastic Constants ◽  
Structure Properties

The elastic properties of polycrystals depend on the single-crystal elastic constants of the crystallites which build up the polycrystal and on the manner in which the crystallites are connected. Because of the technical importance of polycrystalline materials a lot of papers deal with the problem to calculate effective elastic constants of polycrystals from single-crystal and structure properties. This paper gives a review concerning the most important theories and methods respecting this matter.

scholarly journals Generalization of intrinsic ductile-to-brittle criteria by Pugh and Pettifor for materials with a cubic crystal structure

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
O. N. Senkov ◽  
D. B. Miracle
Keyword(s):  
Crystal Structure ◽  
Shear Modulus ◽  
Bulk Modulus ◽  
Single Crystal ◽  
Elastic Constants ◽  
Mechanical Analysis ◽  
Quantum Mechanical ◽  
Modulus Ratio ◽  
Cubic Crystal ◽  
The Difference

AbstractTwo classical criteria, by Pugh and Pettifor, have been widely used by metallurgists to predict whether a material will be brittle or ductile. A phenomenological correlation by Pugh between metal brittleness and its shear modulus to bulk modulus ratio was established more than 60 years ago. Nearly four decades later Pettifor conducted a quantum mechanical analysis of bond hybridization in a series of intermetallics and derived a separate ductility criterion based on the difference between two single-crystal elastic constants, C12–C44. In this paper, we discover the link between these two criteria and show that they are identical for materials with cubic crystal structures.

The elastic properties of single-crystal fayalite as determined by dynamical measurement techniques

1993 ◽  
Vol 141 (2-4) ◽  
pp. 393-414 ◽  
Author(s):  
Donald G. Isaak ◽  
Earl K. Graham ◽  
Jay D. Bass ◽  
Hong Wang
Keyword(s):  
Single Crystal ◽  
Elastic Properties ◽  
Measurement Techniques ◽  
Dynamical Measurement

Elastic properties of grain boundaries in copper and their relationship to bulk elastic constants

1989 ◽  
Vol 40 (14) ◽  
pp. 9479-9484 ◽  
Author(s):  
James B. Adams ◽  
Wilhelm G. Wolfer ◽  
Stephen M. Foiles
Keyword(s):  
Grain Boundaries ◽  
Elastic Properties ◽  
Elastic Constants

scholarly journals High temperature and pressure effects on the elastic properties of B2 intermetallics AgRE

Open Physics ◽  
2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Lili Liu ◽  
Xiaozhi Wu ◽  
Weiguo Li ◽  
Rui Wang ◽  
Qing Liu
Keyword(s):  
High Temperature ◽  
Intermetallic Compounds ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Second Order ◽  
Pressure Effects ◽  
High Temperature And Pressure ◽  
Normal Behavior ◽  
Temperature And Pressure ◽  
Temperature And Pressure Effects

AbstractThe high temperature and pressure effects on the elastic properties of the AgRE (RE=Sc, Tm, Er, Dy, Tb) intermetallic compounds with B2 structure have been performed from first principle calculations. For the temperature range 0-1000 K, the second order elastic constants for all the AgRE intermetallic compounds follow a normal behavior: they decrease with increasing temperature. The pressure dependence of the second order elastic constants has been investigated on the basis of the third order elastic constants. Temperature and pressure dependent elastic anisotropic parameters A have been calculated based on the temperature and pressure dependent elastic constants.

ELASTIC PROPERTIES OF METAL SUPERLATTICES

1985 ◽  
Vol 56 ◽  
Author(s):  
A.F. JANKOWSKI ◽  
T. TSAKALAKOS
Keyword(s):  
Thin Film ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Vapor Deposition ◽  
Short Wavelength ◽  
Plastic Behavior ◽  
Average Composition ◽  
Strain Effects ◽  
Modulated Structure ◽  
Appreciable Increase

AbstractThe elastic properties of modulated structure materials are presented. An enhanced modulus effect has been observed in several composition modulated thin film systems containing short wavelength modulations.8-10nm. The foils were produced by vapor deposition using two or three source evaporator. As compared with homogeneous foils of the same average composition, the modulated foils exhibited an appreciable increase (up to 300%) in modulus. The dependence of various moduli on the modulation parameters (wavelength, composition and amplitude) are described. The plastic behavior, breaking and microhardness of these foils are also presented as a function of the modulation parameters. Current theories based on electronic and strain effects on the elastic constants of metals are also presented to explain the origin of the supermodulus effect.

Elastic Properties of Li 2 B 4 O 7 Single Crystal Determined From Piezoelectric Resonance

2002 ◽  
Vol 75 (6) ◽  
pp. 631-637 ◽  
Author(s):  
I. Franke ◽  
K. Roleder ◽  
S. Miga ◽  
A. Maillard
Keyword(s):  
Single Crystal ◽  
Elastic Properties ◽  
Piezoelectric Resonance
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