Effect of grain size on the crack resistance of aluminum alloys

1994 ◽  
Vol 36 (8) ◽  
pp. 429-436 ◽  
Author(s):  
M. K. Rabinovich ◽  
M. V. Markuskev
Keyword(s):  
Grain Size ◽  
Aluminum Alloys ◽  
Crack Resistance

The Effect of the Erbium Content on the Microstructure and Mechanical Property of 6061 Aluminum Alloys

2017 ◽  
Vol 898 ◽  
pp. 35-40 ◽  
Author(s):  
Wen Jian Lv ◽  
Bo Long Li ◽  
Peng Qi ◽  
Zuo Ren Nie
Keyword(s):  
Solid Solution ◽  
Grain Size ◽  
Tensile Strength ◽  
Aluminum Alloys ◽  
Cast Alloy ◽  
Solution Treatment ◽  
Size Refinement ◽  
Effective Grain Size ◽  
Different Content ◽  
Microstructure And Mechanical Property

The 6061 aluminum alloys with different content of erbium were prepared. The erbium content was optimized by measurement of grain refining effects and tensile strength. After solid solution treatment of the alloy with optimized erbium content at 505 °C ~ 595 °C for 4 h. and then ageing at –160 °C ~ 200 °C for 3 h., the grain size decreased with the content of erbium, achieving the most effective grain size refinement at the erbium content of 0.15wt.%. The tensile strength of as-cast alloy could reach up to 243 MPa at the erbium content of 0.15%. -Combined with the microstructures and mechanical properties, the erbium content of 0.15% was the optimized content, and heat treatments of ageing at 180 °C for 3 h. followed by solid solution at 565 °C for 4 h were suggested.

An analytical approach for predicting as-cast grain size of inoculated aluminum alloys

2015 ◽  
Vol 99 ◽  
pp. 337-346 ◽  
Author(s):  
Xin Bo Qi ◽  
Yun Chen ◽  
Xiu Hong Kang ◽  
Dian Zhong Li ◽  
Qiang Du
Keyword(s):  
Grain Size ◽  
Aluminum Alloys ◽  
Analytical Approach

Comparative analysis of crack-resistance characteristics of semiproducts from high-strength aluminum alloys

1999 ◽  
Vol 41 (6) ◽  
pp. 266-270
Author(s):  
V. V. Teleshov ◽  
D. A. Andreev ◽  
A. P. Golovleva ◽  
E. G. Yakimova ◽  
L. A. Gorskaya
Keyword(s):  
Comparative Analysis ◽  
Aluminum Alloys ◽  
Crack Resistance ◽  
High Strength ◽  
High Strength Aluminum Alloys

Prediction of As-Cast Grain Size of Inoculated Multicomponent Aluminum Alloys

2014 ◽  
Vol 790-791 ◽  
pp. 185-190 ◽  
Author(s):  
Qiang Du ◽  
Yan Jun Li
Keyword(s):  
Numerical Simulation ◽  
Grain Size ◽  
Aluminum Alloys ◽  
Cooling Curve ◽  
Restriction Factor ◽  
Grain Sizes ◽  
Cooling Conditions ◽  
Proposed Model ◽  
Simulation Results ◽  
Melt Composition

In this paper, an extendedMaxwell-Hellawell numerical grain size prediction model is employed to predictas-cast grain size of inoculated aluminum alloys. Given melt composition,inoculation and cooling conditions, the model is able to predict maximumnucleation undercooling, cooling curve and final as-cast grain size of multi-componentalloys. The proposed model has been applied to various binary andmulticomponent alloys. Upon analyzing the numerical simulation results, it isfound that for both binary and multi-component alloys, grain size does not havea one-to-one relation with Growth Restriction Factor, Q, but has a clear ubiquitous correlation with the average diffusivity-weightedQ, defined as W in this paper. This founding helps solve the controversy seen inthe recent work on analytical grain size and Q relations. It also has been used to interpret the scatters seenin the measured grain sizes as a function of Q values reported in the literature.

Cyclic crack resistance of aluminum alloys in the crack origin and growth stages

1987 ◽  
Vol 23 (5) ◽  
pp. 473-479 ◽  
Author(s):  
V. V. Panasyuk ◽  
O. P. Ostash ◽  
E. M. Kostyk ◽  
V. G. Kudryashov ◽  
G. S. Neshpor
Keyword(s):  
Aluminum Alloys ◽  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Growth Stages ◽  
Crack Origin

scholarly journals The Effect of Grain Size on the Threshold Stress for Superplastic Flow in Aluminum Alloys

1999 ◽  
Vol 40 (8) ◽  
pp. 760-764 ◽  
Author(s):  
W. J. Kim ◽  
D. W. Kum
Keyword(s):  
Grain Size ◽  
Aluminum Alloys ◽  
Threshold Stress ◽  
Superplastic Flow

scholarly journals Crystal Diffraction Techniques Were Used to Investigate the Structural Properties of Some Aluminum Alloys.

2022 ◽  
Vol 961 (1) ◽  
pp. 012018
Author(s):  
Sukaina Iskandar Yusuf ◽  
Mohammed Muhana Meteab ◽  
Abdulkader Ahmed Annaz
Keyword(s):  
Grain Size ◽  
Aluminum Alloys ◽  
Structural Properties ◽  
Spherical Shape ◽  
Sem Analysis ◽  
Theoretical Density ◽  
X Ray Diffraction ◽  
X Ray ◽  
Average Grain Size ◽  
Radiation Shields

Abstract Due to the importance of these alloys in the manufacture of aircraft, coatings, radiation shields, and electronic circuits, the study’s objectives include investigating previously unstudied structural properties of some aluminum alloys, alloy A (Al-Zn-Mg-Ti) and alloy B (Al-Zn-Mg-Mn) were prepared using the casting method, and their structural properties were studied using X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques (granular size and theoretical density). The results of analyzing the X-ray diffraction data and determining the phases formed on the two alloys after matching them with the international standard cards (JCPDS) revealed that it is polycrystalline, with structures (cubic and hexagonal) on alloy A and structures (cube, hexagonal, and anorthic) on alloy B. The results revealed that the average grain size estimated by the Debye-Scherer method is less than that estimated by the Williamson-Hall method, and that the grain size of alloy A is less than that of alloy B due to the presence of titanium in alloy A’s composition, which works to reduce particle size. The theoretical density of Alloy A and B that was used in X-ray diffraction was calculated. SEM analysis of the spherical shape of the grains on the surfaces of alloys A and B revealed that the average grain size on the surface of alloy A is smaller than on the surface of alloy B, which is consistent with the results of XRD analyses.

scholarly journals Recent Development of Superplasticity in Aluminum Alloys: A Review

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 77 ◽  
Author(s):  
Laxman Bhatta ◽  
Alexander Pesin ◽  
Alexander P. Zhilyaev ◽  
Puneet Tandon ◽  
Charlie Kong ◽  
...  
Keyword(s):  
Grain Size ◽  
Aluminum Alloys ◽  
Grain Boundary ◽  
Solute Drag ◽  
Grain Boundary Sliding ◽  
Dislocation Motion ◽  
Vital Role ◽  
Superplastic Behavior ◽  
Wide Range ◽  
Commercial Applications

Aluminum alloys can be used in the fabrication of intricate geometry and curved parts for a wide range of uses in aerospace and automotive sectors, where high stiffness and low weight are necessitated. This paper outlines a review of various research investigations on the superplastic behavior of aluminum alloys that have taken place mainly over the past two decades. The influencing factors on aluminum alloys superplasticity, such as initial grain size, deformation temperature, strain rate, microstructure refinement techniques, and addition of trace elements in aluminum alloys, are analyzed here. Since grain boundary sliding is one of the dominant features of aluminum alloys superplasticity, its deformation mechanism and the corresponding value of activation energy are included as a part of discussion. Dislocation motion, diffusion in grains, and near-grain boundary regions being major features of superplasticity, are discussed as important issues. Moreover, the paper also discusses the corresponding values of grain size exponent, stress exponent, solute drag creep and power law creep. Constitutive equations, which are essential for commercial applications and play a vital role in predicting and analyzing the superplastic behavior, are also reviewed here.

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