The grain size and orientation dependence of geometrically necessary dislocations in polycrystalline aluminum during monotonic deformation: Relationship to mechanical behavior

2020 ◽  
Vol 775 ◽  
pp. 138939 ◽  
Author(s):  
Shiqi Zhang ◽  
Wei Liu ◽  
Jifang Wan ◽  
R.D.K. Misra ◽  
Qiang Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
Mechanical Behavior ◽  
Orientation Dependence ◽  
Polycrystalline Aluminum ◽  
Grain Size And Orientation ◽  
Deformation Relationship

scholarly journals Strain Amount Dependent Grain Size and Orientation Developments during Hot Compression of a Polycrystalline Nickel Based Superalloy

Materials ◽  
2017 ◽  
Vol 10 (2) ◽  
pp. 161 ◽  
Author(s):  
Guoai He ◽  
Liming Tan ◽  
Feng Liu ◽  
Lan Huang ◽  
Zaiwang Huang ◽  
...  
Keyword(s):  
Grain Size ◽  
Hot Compression ◽  
Polycrystalline Nickel ◽  
Nickel Based Superalloy ◽  
Grain Size And Orientation

scholarly journals Numerical Study of the Influence of Grain Size and Loading Conditions on the Deformation of a Polycrystalline Aluminum Alloy

2014 ◽  
Vol 02 (06) ◽  
pp. 425-430 ◽  
Author(s):  
O. Zinovieva ◽  
V. Romanova ◽  
R. Balokhonov ◽  
A. Zinoviev ◽  
Zh. Kovalevskaya
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Numerical Study ◽  
Loading Conditions ◽  
Polycrystalline Aluminum

Paradox of Strength and Ductility in Metals Processed Bysevere Plastic Deformation

2002 ◽  
Vol 17 (1) ◽  
pp. 5-8 ◽  
Author(s):  
R. Z. Valiev ◽  
I. V. Alexandrov ◽  
Y. T. Zhu ◽  
T. C. Lowe
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Grain Size ◽  
Yield Strength ◽  
Mechanical Behavior ◽  
High Strength ◽  
High Ductility ◽  
Elongation To Failure ◽  
Failure Ductility ◽  
Strength And Ductility

It is well known that plastic deformation induced by conventional forming methodssuch as rolling, drawing or extrusion can significantly increase the strength of metalsHowever, this increase is usually accompanied by a loss of ductility. For example, Fig.1 shows that with increasing plastic deformation, the yield strength of Cu and Almonotonically increases while their elongation to failure (ductility) decreases. Thesame trend is also true for other metals and alloys. Here we report an extraordinarycombination of high strength and high ductility produced in metals subject to severeplastic deformation (SPD). We believe that this unusual mechanical behavior is causedby the unique nanostructures generated by SPD processing. The combination ofultrafine grain size and high-density dislocations appears to enable deformation by newmechanisms. This work demonstrates the possibility of tailoring the microstructures ofmetals and alloys by SPD to obtain both high strength and high ductility. Materialswith such desirable mechanical properties are very attractive for advanced structuralapplications.

Grain size and orientation distributions: Application to yielding of α-titanium

2009 ◽  
Vol 57 (8) ◽  
pp. 2339-2348 ◽  
Author(s):  
Bradley S. Fromm ◽  
Brent L. Adams ◽  
Sadegh Ahmadi ◽  
Marko Knezevic
Keyword(s):  
Grain Size ◽  
Orientation Distributions ◽  
Grain Size And Orientation

Effects of initial grain size and orientation on the twin behavior in ZK60 Mg alloy

2020 ◽  
Vol 167 ◽  
pp. 110496
Author(s):  
Lei Zhao ◽  
Mengna Zhang ◽  
Jinhui Wang ◽  
Bo Shi ◽  
Peipeng Jin
Keyword(s):  
Grain Size ◽  
Mg Alloy ◽  
Grain Size And Orientation

Grain Size Distribution Effect on Mechanical Behavior of Nanocrystalline Materials

2004 ◽  
Vol 821 ◽  
Author(s):  
A.V. Sergueeva ◽  
N.A. Mara ◽  
A.K. Mukherjee
Keyword(s):  
Grain Size ◽  
Mechanical Behavior ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Nanocrystalline Materials ◽  
Tensile Deformation ◽  
Size Structure ◽  
Niti Alloy ◽  
Distribution Effect ◽  
The Matrix

AbstractGrain size distribution effect on the mechanical behavior of NiTi and Vitroperm alloys were investigated. Yielding at significantly lower stresses than found in equiaxed counterparts, along with well defined strain hardening was observed in these nanocrystalline materials with large grains embedded in the matrix during tensile deformation at temperatures of 0.4Tm. At higher temperature the effect of grain size distribution on yield stress was not revealed while plasticity was increased in 50% in NiTi alloy with bimodal grain size structure.

Orientation-dependent Constitutive Model with Nonlinear Elasticity for Shocked β-HMX Single Crystal

2012 ◽  
Vol 13 (1) ◽  
Author(s):  
Yan-Qing Wu ◽  
Feng-Lei Huang
Keyword(s):  
Constitutive Model ◽  
Single Crystal ◽  
Mechanical Behavior ◽  
Single Crystals ◽  
Nonlinear Elasticity ◽  
Chemical Reactions ◽  
Crystal Plasticity ◽  
Orientation Dependence ◽  
Plasticity Model ◽  
Crystal Plasticity Model

AbstractAs orientation-dependence of shock-induced thermal responses and chemical reactions in energetic single crystals are related to anisotropic mechanical behavior, a crystal plasticity model for low-symmetric

scholarly journals Porous textured ceramics with controlled grain size and orientation

2021 ◽  
Vol 41 (1) ◽  
pp. 617-624 ◽  
Author(s):  
Rohit Pratyush Behera ◽  
Syafiq Bin Senin Muhammad ◽  
Marcus He Jiaxuan ◽  
Hortense Le Ferrand
Keyword(s):  
Grain Size ◽  
Textured Ceramics ◽  
Grain Size And Orientation

Temperature Dependent Mechanical Behavior of ODS Steels

2018 ◽  
Vol 941 ◽  
pp. 257-262
Author(s):  
Massimo de Sanctis ◽  
Alessandra Fava ◽  
Gianfranco Lovicu ◽  
Roberto Montanari ◽  
Maria Richetta ◽  
...  
Keyword(s):  
Grain Size ◽  
Mechanical Alloying ◽  
Mechanical Behavior ◽  
Hot Isostatic Pressing ◽  
Hot Extrusion ◽  
Oxide Dispersion Strengthened ◽  
Steel Powder ◽  
High Energy ◽  
Superior Mechanical Properties ◽  
Ods Steels

An oxide dispersion strengthened (ODS) ferritic steel with nanometric grain size has been produced by means of low-energy mechanical alloying (LEMA) of steel powder (Fe-14Cr-1W-0.4Ti) mixed with Y2O3 particles (0.3 wt%) and successive hot extrusion (HE). The material has equiaxed grains (mean size of 400 nm) and dislocation density of 4 x 1012 m-2, and exhibits superior mechanical properties with respect the unreinforced steel. The mechanical behavior has been compared with that of ODS steels prepared by means of the most common process, high-energy mechanical alloying (HEMA), consolidation through hot isostatic pressing (HIP) or hot extrusion (HE), annealing around 1100 °C for 1-2 hours, which produces a bimodal grain size distribution. The strengthening mechanisms have been examined and discussed to explain the different behavior.

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