Effects of deformation temperature on second-phase particles and mechanical properties of 2219 Al-Cu alloy

The Zr element is one of the important grain refiners for 7xxx series Al-Zn-Mg-Cu alloys, but the effect of Zr content more than 0.15 wt.% needs to be deeply investigated under the action of ultrasonic vibration. In this study, the effects of Zr contents (0.1 to 0.25 wt.%) on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy were studied. The results showed that Zr element could refine grains, but when the Zr content was greater than 0.15 wt.%, the grain size was not uniform, the number of second phase particles increased, and the segregation of components became more serious. It was found that after ultrasonic treatment, the grain-size inhomogeneity was greatly improved, and the Zr content could be added up to 0.2 wt.%. When the Zr content is equal or lower than 0.2 wt.%, ultrasonic treatment can effectively improve the mechanical properties of materials by refining grains and weakening segregation. However, when the Zr content is up to 0.25 wt.%, the effect is getting worse.

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The second phase particles and mechanical properties of 2124 aluminum alloy processed by accumulative back extrusion

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2014.01.078 ◽

2014 ◽

Vol 58 ◽

pp. 535-542 ◽

Cited By ~ 25

Author(s):

P. Shaterani ◽

A. Zarei-Hanzaki ◽

S.M. Fatemi-Varzaneh ◽

S.B. Hassas-Irani

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Second Phase ◽

Second Phase Particles

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Evolution of the second phase particles during the heating-up process of solution treatment of Al–Zn–Mg–Cu alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2015.06.058 ◽

2015 ◽

Vol 641 ◽

pp. 237-241 ◽

Cited By ~ 32

Author(s):

Guosheng Peng ◽

Kanghua Chen ◽

Songyi Chen ◽

Huachan Fang

Keyword(s):

Solution Treatment ◽

Second Phase ◽

Cu Alloy ◽

Second Phase Particles ◽

Heating Up

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Effect of Nanometer Magnesium Oxide Addition on the Cast Microstructure of X80 Pipeline Steel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.401-403.610 ◽

2013 ◽

Vol 401-403 ◽

pp. 610-613

Author(s):

Jian Ming Wang ◽

Yang Liu ◽

Yan Liu ◽

Qian He Ma

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Magnesium Oxide ◽

Pipeline Steel ◽

Harsh Environment ◽

Second Phase ◽

X80 Pipeline Steel ◽

Oxide Addition ◽

Second Phase Particles ◽

Cast Microstructure

The pipeline steel as an application in pipeline construction must have good comprehensive mechanical properties due to the harsh environment of the pipeline engineering. So this experiment takes the X80 pipeline steel as the research object, the thermal stability second phase particles which would not be dissolved or aggregated at high temperature will be expected by means of adding nanomagnesium oxide into the steel with the method of carrier dispersion addition. The effect of nanometer magnesium oxide addition on the cast microstructure of X80 pipeline steel was analysed. The results show that the cast microstructure is consist of the ferrite and a small amount bainite. And the bainite is distributed at the boundary of the ferrite grains. When adding 0.02 wt% nanometer magnesium oxides, the number of bainite increases significantly in the cast microstructure, which is mostly distributed at the boundary of the ferrite grains.

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Role of second-phase particles in the microstructural evolution and mechanical properties of extruded Mg-Gd-Y-Ag-Zr alloys

Materials Today Communications ◽

10.1016/j.mtcomm.2020.100956 ◽

2020 ◽

Vol 24 ◽

pp. 100956

Author(s):

Fan Zhang ◽

Yafei Wang ◽

Yunbiao Duan ◽

Kaijun Wang ◽

Yutian Wang ◽

...

Keyword(s):

Mechanical Properties ◽

Microstructural Evolution ◽

Second Phase ◽

Second Phase Particles ◽

Zr Alloys

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Alloying and Processing Effects on the Microstructure, Mechanical Properties, and Degradation Behavior of Extruded Magnesium Alloys Containing Calcium, Cerium, or Silver

Materials ◽

10.3390/ma13020391 ◽

2020 ◽

Vol 13 (2) ◽

pp. 391 ◽

Cited By ~ 6

Author(s):

Jan Bohlen ◽

Sebastian Meyer ◽

Björn Wiese ◽

Bérengère J. C. Luthringer-Feyerabend ◽

Regine Willumeit-Römer ◽

...

Keyword(s):

Mechanical Properties ◽

Magnesium Alloys ◽

Processing Parameters ◽

Second Phase ◽

Degradation Behavior ◽

Microstructure Development ◽

Corrosion Properties ◽

Second Phase Particles ◽

Degradation Rates ◽

The Relationship

Magnesium alloys attract attention as degradable implant materials due to their adjustable corrosion properties and biocompatibility. In the last few decades, especially wrought magnesium alloys with enhanced mechanical properties have been developed, with the main aim of increasing ductility and formability. Alloying and processing studies allowed demonstrating the relationship between the processing and the microstructure development for many new magnesium alloys. Based on this experience, magnesium alloy compositions need adjustment to elements improving mechanical properties while being suitable for biomaterial applications. In this work, magnesium alloys from two Mg-Zn series with Ce (ZE) or Ca (ZX) as additional elements and a series of alloys with Ag and Ca (QX) as alloying elements are suggested. The microstructure development was studied after the extrusion of round bars with varied processing parameters and was related to the mechanical properties and the degradation behavior of the alloys. Grain refinement and texture weakening mechanisms could be improved based on the alloy composition for enhancing the mechanical properties. Degradation rates largely depended on the nature of second phase particles rather than on the grain size, but remained suitable for biological applications. Furthermore, all alloy compositions exhibited promising cytocompatibility.

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Wear Properties of Y-TZP Ceramics Dispersed with Second Phase Particles

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.744 ◽

2008 ◽

Vol 368-372 ◽

pp. 744-747

Author(s):

Xiao Ping Liang ◽

Shao Bo Xin ◽

Xiao Hui Wang ◽

Zheng Fang Yang

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Mass Fraction ◽

Normal Load ◽

Roller Bearing ◽

Second Phase ◽

Wear Properties ◽

Wear Rates ◽

Second Phase Particles ◽

Better Than

The wear properties of ADZ (alumina dispersed in Y-TZP) and MDZ (mullite dispersed in Y-TZP) were investigated by using a ring-on-block tribometer. The results showed that for Y-TZP ceramic, the addition of alumina phase (with 10-20% in mass fraction) leads to an improved wear resistance. With the increase of the normal load, the wear rates of ADZ ceramics increase. Under low and medium normal load (100N and 300N), the wear resistance is controlled by the hardness of ceramics, and under high normal load (500N) the fracture toughness is obviously contributed to the wear resistance of the ceramics. For MDZ ceramic, the wear resistance of 15MDZ (15wt% mullite dispersed in Y-TZP) is better than that of 20 MDZ (20wt% mullite) under the normal load from 100 N to 500 N. The mechanical properties of 15MDZ are worse than that of Y-TZP ceramic, but the wear resistance is enhanced due to the action of “needle roller bearing” of the fractured rod-like mullite particles.

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Effect of Nb Addition on the Structural and Mechanical Properties of Cu46Zr42Al7Y5 Bulk Metallic Glass

Materials Science Forum ◽

10.4028/www.scientific.net/msf.675-677.201 ◽

2011 ◽

Vol 675-677 ◽

pp. 201-204

Author(s):

Y.L. Du ◽

H.W. Xu ◽

J.L. Cheng ◽

Guang Chen

Keyword(s):

Mechanical Properties ◽

Amorphous State ◽

Differential Scanning Calorimetric ◽

Second Phase ◽

Glass Forming ◽

Copper Mold Casting ◽

Mold Casting ◽

Second Phase Particles ◽

Nb Content ◽

Nb Addition

In this work, the Cu46Zr42-xAl7Y5Nbx alloys with different Nb contents were prepared by water-cooled copper mold casting. The effects of Nb addition on the structural and mechanical properties were studied. It was found that the structure remains in amorphous state at low Nb concentration (x =1, 2). However, some crystalline phases appear in the high Nb content alloy (x > 2), showing a composite structure, that is, the second phase particles dispersed in an amorphous matrix. The effects of Nb on the glass-forming ability of Cu46Zr42Al7Y5 were studied by differential scanning calorimetric (DSC). The compressive mechanical properties of Cu46Zr42-xAl7Y5Nbx alloys were studied. It was found that the compressive strength can be improved by introducing Nb. However, the ductile of the alloys were not improved by the introduction of Nb.

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