scholarly journals Effects of Sc and Zr Addition on Microstructure and Mechanical Properties of AA5182

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4753
Author(s):  
Jingxiao Li ◽  
Xiaofang Yang ◽  
Shihua Xiang ◽  
Yongfa Zhang ◽  
Jie Shi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Grain Boundary ◽  
Tensile Properties ◽  
Isothermal Annealing ◽  
Zr Addition ◽  
Microstructure And Mechanical Properties ◽  
Alloy Microstructure ◽  
Zr Alloy ◽  
Grain Boundary Strengthening

The effects of 0.1 wt.% Sc and 0.1 wt.% Zr addition in AA5182 on microstructure and mechanical properties were investigated. Results show that Al3(ScxZr1−x) dispersoids formed in AA5182. Observation of ingots microstructures showed that the grain size of 5182-Sc-Zr alloy was 56% lower than that of based AA5182. Isothermal annealing between 230 °C and 500 °C for 2 h was performed to study the recrystallization, tensile properties and dispersoid coarsening. The recrystallization was inhibited by the dispersoids, and the alloy microstructure remained deformed after annealing. Al3(ScxZr1−x) in AA5182 was stable when annealing below 400 °C, while parts of dispersoids coarsened significantly when heating at 500 °C. The addition of Sc and Zr allowed YS of 5182 alloy to achieve 247.8 MPa, which is 100 MPa higher than the corresponding AA5182. The contributions of Orowan strengthening and grain boundary strengthening were obtained by calculation.

Influence of Annealing on the Microstructure and Mechanical Properties of Electrodeposited Nanocrystalline Nickel

2011 ◽  
Vol 683 ◽  
pp. 103-112 ◽  
Author(s):  
B. Yang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Elastic Modulus ◽  
Grain Boundary ◽  
Boundary Structure ◽  
Boundary State ◽  
Microstructure And Mechanical Properties ◽  
Grain Boundary Structure ◽  
Average Grain Size ◽  
Different Grain Size

The evolution of the microstructure and mechanical properties of electrodeposited nanocrystalline Ni with different annealing procedures was studied systematically. For the annealed specimens hardness decreases with increasing average grain size but the dependence changes at different grain size ranges. The specimens annealed at a low temperature show higher hardness compared to the as-deposited nanocrystalline Ni, despite an increased measured average grain size. In association with this hardening an increase in elastic modulus and a decrease in microstrain was observed after annealing. With increasing annealing temperature both the tensile strength and the fracture strain were observed to decrease, this is companied with a transition from ductile to brittle in the fracture surfaces. These results indicated that the mechanical behaviour of nanocrystalline Ni depends not only on the average grain size but also on the grain boundary structure. A change in the grain boundary state arising from annealing may be responsible for the observed increase in hardness and elastic modulus as well as the deterioration of tensile properties.

Effect of La-Rich Misch Metal on Microstructure and Mechanical Properties of As-Extruded Mg-14Li-3Al Alloy

2011 ◽  
Vol 391-392 ◽  
pp. 32-36 ◽  
Author(s):  
Bin Liu ◽  
Jing Huai Zhang ◽  
Zhong Yi Niu ◽  
Jun Qing Li
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Properties ◽  
Grain Refinement ◽  
Hot Extrusion ◽  
Vacuum Melting ◽  
Melting Method ◽  
Misch Metal ◽  
Microstructure And Mechanical Properties

The as-cast Mg-14Li-3Al-(0-0.9)RE alloys were prepared with vacuum melting method, then processed by hot extrusion. The microstructure and tensile properties were investigated. The results show that both addition of RE and extrusion deformation can refine the grain size. Al3La compounds are formed with addition of La-rich misch metal. The as-extruded Mg-14Li-3Al-0.6RE alloy obtains the finest grain size (4.28 μm) and the highest mechanical properties (σb=222.75 MPa, δ=23.8%), which is related to the grain refinement and the formation of Al3La.

Microstructure and Mechanical Properties of Cast and Semi-Solid Formed Mg-Al-Zn Alloys

2006 ◽  
Vol 116-117 ◽  
pp. 288-291 ◽  
Author(s):  
Jeong Min Kim ◽  
Bong Koo Park ◽  
Joong Hwan Jun ◽  
Ki Tae Kim ◽  
Woon Jae Jung
Keyword(s):  
Mechanical Properties ◽  
Grain Boundary ◽  
Tensile Properties ◽  
Room Temperature ◽  
Forming Process ◽  
Microstructure And Mechanical Properties ◽  
Cast Alloys ◽  
Semi Solid ◽  
Zn Alloys ◽  
Conventionally Cast

Various Mg-Al-Zn alloys with different Al and Zn contents were fabricated by conventional casting and semi-solid forming process. And the microstructure and mechanical properties of the alloys were investigated. In Mg-4%Al-(5~7)%Zn alloys most of the grain boundary phases were found to be Mg-Al-Zn while in Mg-6%Al or Mg-8%Al based alloys the Mg- Al-Zn phase coexisted with Mg17Al12 at grain boundaries. At room temperature the semi-solid formed alloys showed significantly higher tensile properties, especially elongation, than the conventionally cast alloys.

The Effect of Mixed RE Elements on Microstructure and Mechanical Properties of Die-Cast AZ91D Alloy

2014 ◽  
Vol 941-944 ◽  
pp. 59-65
Author(s):  
Jia Wei Yuan ◽  
Xing Gang Li ◽  
Kui Zhang ◽  
Yong Jun Li ◽  
Ming Long Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Properties ◽  
Room Temperature ◽  
Az91d Alloy ◽  
Microstructure And Mechanical Properties ◽  
Die Cast ◽  
Fracture Behaviors ◽  
Re Elements

The effect of mixed RE elements (Y, Nd, Gd ) on the microstructure and tensile properties of die-cast AZ91D alloy were investigated. The results indicated that the content of mixed RE elements lead to the change of the formation of Al▔RE compounds and reduction of the fraction of β-Mg17Al12 phase. The grain size of the alloy added 1.0wt. % RE became smaller than die-cast AZ91D and AZ91D+2.0wt. % RE alloys. The UTS of die-cast AZ91D+xRE(x=0 wt. %, 1.0wt. %, 2.0 wt. %) alloys were 204MPa, 194MPa, 203.6MPa at room temperature, respectively. Moreover, RE addition resulted in fracture behaviors changed.

Microstructure and Mechanical Properties of TiB2/Al-Si Composites Fabricated by Electron Beam Rapid Manufacture

2021 ◽  
Vol 1035 ◽  
pp. 884-891
Author(s):  
Qing Feng Yang ◽  
Cun Juan Xia ◽  
Xian Feng Li ◽  
Hao Wei Wang ◽  
Nan Liao
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Grain Size ◽  
Electron Beam ◽  
Grain Boundary ◽  
Microstructure And Mechanical Properties ◽  
Average Grain Size ◽  
Before And After ◽  
Rapid Manufacture ◽  
Equiaxed Grains

Bulky sample was fabricated by electron beam rapid manufacture (EBRM) technology, in which Ф1.6 mm wire of in-situ TiB2/Al-Si compositeswas selected as deposition metal, following byT6 heat treatment. The microstructure and mechanical properties of the bulky sample before and afterheat treatment were analyzed. Experimental results showed that the microstructure parallel to the weld was similar to that perpendicular to the weld. The microstructure of the as-deposited sample consisted of columnar and equiaxed grains, in which siliconwas distributed along the grain boundary and the grain size was about 30 μm. Besides, some TiB2 particles converged at the grain boundary. After T6 heat treatment, the average grain size of the sample increasedobviously.The average hardness of the sample was increased to 114.65 HV from 46.55 HV, an increase of 146%. The tensile strength of the sample increased to 326.66MPafrom 143.97 MPa, but the elongationdecreased compared with that of the as-deposited state. The tensile test showed that the mechanical properties of TiB2/Al-Si composites formed by electron beam rapid manufacture were isotropic before and after heat treatment.

Effect of Gd on the Microstructure and Mechanical Properties of Mg-Sn-Zn-Al Alloy

2013 ◽  
Vol 312 ◽  
pp. 411-414 ◽  
Author(s):  
C.F. Fang ◽  
L.G. Meng ◽  
Y.F. Wu ◽  
L.H. Wang ◽  
X.G. Zhang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Tensile Properties ◽  
Al Alloy ◽  
Lattice Constants ◽  
Microstructure And Mechanical Properties ◽  
Microstructures And Mechanical Properties

The effect of Gd addition on the microstructures and mechanical properties of Mg-5Sn-Zn-Al alloy was investigated with variations of Gd contents. These results show that adding Gd can effectively refine the grain size and growth. In addition, the solubility of Gd increases the lattice constants ofα-Mg phase. Accordingly, the tensile properties of the as-cast Mg-5Sn-Zn-Al alloy are improved by the addition of Gd. The Mg-5Sn-Zn-Al-0.4Gd exhibits the highest tensile properties, and the values of the yield and ultimate tensile strength and elongation are 111 MPa, 188 MPa and 18.0%, respectively.

Microstructure and Mechanical Properties of Mg-Zn-Ca-Zr Alloy for Biomedical Application

2013 ◽  
Vol 774-776 ◽  
pp. 791-794
Author(s):  
Dong Mei Jiang ◽  
Liang Guo ◽  
Zhan Yi Cao ◽  
Xu Sun ◽  
Feng Xiao Huang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Biomedical Application ◽  
The Other ◽  
Tensile Yield Strength ◽  
Secondary Phases ◽  
Size Refinement ◽  
Microstructure And Mechanical Properties ◽  
Zr Alloy ◽  
Zr Alloys

The microstructure and mechanical properties of the as-cast Mg-Zn-Ca-Zr alloys were investigated in this study. The results showed that the alloy was mainly composed of α-Mg solid solution and the secondary phases of Ca2Mg6Zn3. The grain size of alloys decreased from 82 μm to 38 μm with Zr content from 0.1% to 0.5%. The addition of Zr greatly improved the ultimate tensile strength (σb) and elongation (ε), while slightly improved the tensile yield strength (σ0.2). The σb, ε and σ0.2 of the Mg-4Zn-0.5Ca-0.5Zr were 196MPa, 85MPa and 16.1% compared with the other two alloys. The reason was that grain size refinement strengthening enhanced the mechanical properties.

scholarly journals Additively manufactured novel Al-Cu-Sc-Zr alloy: Microstructure and mechanical properties

2020 ◽  
pp. 101623
Author(s):  
Priyanka Agrawal ◽  
Sanya Gupta ◽  
Saket Thapliyal ◽  
Shivakant Shukla ◽  
Ravi Sankar Haridas ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Alloy Microstructure ◽  
Zr Alloy

Effect of Nd and Y Addition on Microstructure and Mechanical Properties of Extruded Mg-Zn-Zr Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 413-416 ◽  
Author(s):  
Qiang Li ◽  
Qu Dong Wang ◽  
Da Quan Li ◽  
Wen Jiang Ding
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Hot Extrusion ◽  
Elevated Temperature Strength ◽  
Microstructure And Mechanical Properties ◽  
Average Grain Size ◽  
The Matrix ◽  
T Phase ◽  
Zr Alloy ◽  
Zr Alloys

The effect of Nd and Y addition on the microstructure and mechanical properties of as-extruded Mg-Zn-Zr magnesium alloy has been investigated in this study. The Mg-Zn-Zr alloy had 11 μm average grain size due to dynamic recrystallization during hot extrusion; but the average grain sizes of the Mg-Zn-Nd-Y-Zr alloys were markedly reduced to 4 μm by Nd and Y additions. The lamellar α-Mg + T phase or α-Mg + W phase eutectics at grain boundaries in as-cast Mg-Zn-Nd-Y-Zr alloys were broken up and MgZn2 precipitates in the matrix are obtained during hot extrusions. The mechanical properties of as-extruded Mg-Zn-Zr alloy were improved significantly by Nd and Y additions, especially the elevated temperature strength, which was above 150 MPa in ultimate tensile strength at 250 °C. These may be ascribed to the very fine grain size, the dispersed T phase or W phase and the MgZn2 type Laves phase precipitating during hot extrusion.

MICROCAST-X MAR-M-247

Alloy Digest ◽  
1995 ◽  
Vol 44 (5) ◽  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Properties ◽  
Negative Impact ◽  
Rupture Properties

Abstract The Microcast-X process produces a substantially finer grain size that improves mechanical properties in MAR-M-247 with modest negative impact on rupture properties above 1600 F (871 C). This datasheet provides information on composition, microstructureand tensile properties as well as creep and fatigue. It also includes information on casting. Filing Code: Ni-481. Producer or source: Howmet Corporation.

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