Mechanical Properties of Centrifugal Casting Al-Cu Alloys

2011 ◽  
Vol 675-677 ◽  
pp. 629-632
Author(s):  
Ai Hui Liu ◽  
Yan Wei Sui ◽  
Bang Sheng Li ◽  
Jing Jie Guo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Grain Boundary ◽  
Rotation Speed ◽  
Centrifugal Casting ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Specific Elongation ◽  
Alloy Castings

In this work, the effects of centrifugal radius and mould rotation speed on the tensile strength, yield strength, specific elongation, and microhardness on Al-Cu alloy castings are investigated. The results show that, with increasing the centrifugal radius or mould rotation speed, the mechanical properties increase gradually. With increasing the centrifugal radius, the variation amplitude of mechanical properties of Al-Cu alloys at mould rotation speed 600rpm is greater than that at 300rpm. This is due to the finer microstructure and the strengthened grain boundary and then resulting in the increase of the resistance to dislocation slipping.

Relationship between Microstructures and Mechanical Properties of Ti-6Al-4V Alloy in Centrifugal Casting

2011 ◽  
Vol 295-297 ◽  
pp. 496-499
Author(s):  
Yan Wei Sui ◽  
Ai Hui Liu ◽  
Bang Sheng Li ◽  
Jing Jie Guo ◽  
Wei Biao Ju
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Yield Strength ◽  
Centrifugal Casting ◽  
Induction Melting ◽  
Melting Technology ◽  
Specific Elongation ◽  
Elongation Percentage ◽  
Alloy Castings

Ti-6Al-4V alloy castings are made by means of induction melting technology. The relationships between grain size and tensile strength, yield strength, elongation percentage, investigated for Ti-6Al-4V alloy castings. The results show that the relationships between grain size, and tensile strength, yield strength, specific elongation, meet the Hall-Petch equation.

RESEARCH OF MECHANICAL PROPERTY GRADIENT DISTRIBUTION OF Al-Cu ALLOY IN CENTRIFUGAL CASTING

2011 ◽  
Vol 18 (06) ◽  
pp. 297-301 ◽  
Author(s):  
ZHI SUN ◽  
YANWEI SUI ◽  
AIHUI LIU ◽  
BANGSHENG LI ◽  
JINGJIE GUO
Keyword(s):  
Mechanical Property ◽  
Rotation Speed ◽  
Centrifugal Casting ◽  
Distribution Characteristic ◽  
Gradient Distribution ◽  
Cu Content ◽  
Cu Alloy ◽  
Content Change ◽  
Alloy Castings ◽  
Two Sides

Al-Cu alloy castings are obtained using centrifugal casting. The regularity of mechanical property gradient distribution of Al-Cu alloy castings with the same centrifugal radius at different positions is investigated. The result shows that the tensile strength, yield strength, elongation and microscope hardness exhibit the following gradient distribution characteristic — high on both sides and low on the center. The trend of mechanical property gradient distribution of Al-Cu alloy increases with the increase in the rotation speed. Moreover, the mechanical properties of casting centerline two sides have asymmetry. The reason is that the grain size of casting centerline two sides and Al2Cu phase and Cu content change correspondingly.

Relationship between Thickness of Lamellar α+β Phase and Mechanical Properties of Titanium Alloy

2011 ◽  
Vol 311-313 ◽  
pp. 1916-1919 ◽  
Author(s):  
Yan Wei Sui ◽  
Ai Hui Liu ◽  
Bang Sheng Li ◽  
Jing Jie Guo
Keyword(s):  
Tensile Strength ◽  
Titanium Alloy ◽  
Yield Strength ◽  
Tensile Property ◽  
Vickers Hardness ◽  
Induction Melting ◽  
Β Phase ◽  
Specific Elongation ◽  
Elongation Percentage ◽  
Alloy Castings

Titanium alloy castings are made by means of induction melting technology. The relationships thickness of lamellar α+β phase and tensile strength, yield strength, elongation percentage, and Vickers-hardness, as well as the effect of tensile property on the Vickers-hardness are investigated for Ti-6Al-4V alloy castings. The results show that the relationships between thickness of lamellar α+β phase, and tensile strength, yield strength, specific elongation, and Vickers-hardness meet the Hall-Petch equation. And the tensile property increases linearly with Vickers-hardness.

Microstructure and Formability of Different-Speeds Rolled AZ31 Mg Sheet

2007 ◽  
Vol 544-545 ◽  
pp. 407-410 ◽  
Author(s):  
Jae Seol Lee ◽  
Hyeon Taek Son ◽  
Young Kyun Kim ◽  
Ik Hyun Oh ◽  
Chang Seog Kang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Grain Boundary ◽  
Microstructure Evolution ◽  
Hot Rolling ◽  
Potential Application ◽  
Plastic Anisotropy ◽  
Mg Alloys ◽  
Az31 Mg Alloy

The aims of this study ares to investigate the microstructure evolution of AZ31 Mg alloys with normal rolling and different speeds rolling during hot rolling affects microstructure, texture and mechanical properties of AZ31 Mg alloy. In the microstructures of as-rolled both samples, twins are clearly apparent, small and recrystallized grains are visible along some grain boundary and twinned regions. The tensile strength and yield strength of DSR sample were slightly higher than that of NR sample. Also, in the case of the NR sample, tensile strength indicated different values to the rolling directions. From this result, NR sample compared to DSR sample strongly indicated to the plastic anisotropy tendency. Therefore, it is noted that DSR sample could be presented to the good formability, comparing to the NR sample. DSR samples deformed at 473K and 523K could be perfectly formed, indicating the potential application of the DSR process to improve formability of the Mg alloys at warm temperatures.

scholarly journals Precipitate Behavior, Mechanical Properties and Corrosion Behavior of an Al-Zn-Mg-Cu Alloy during Non-Isothermal Creep Aging with Axial Tension Stress

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 378 ◽  
Author(s):  
Junhao Zhu ◽  
Bo Jiang ◽  
Danqing Yi ◽  
Haishen Wang ◽  
Guicheng Wu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Grain Boundary ◽  
Corrosion Behavior ◽  
Volume Fraction ◽  
Aging Condition ◽  
Cooling Stage ◽  
Cu Alloy ◽  
Isothermal Creep ◽  
Mechanical Properties And Corrosion

Theprecipitate behavior, mechanical properties and corrosion behavior of an Al-Zn-Mg-Cu alloy during non-isothermal creep aging were investigated. The results show that diffraction patterns of GPI zones gradually disappear and those of η′ phases are strengthened during the heating stage. More importantly, the size and volume fraction of precipitates increase with aging temperature increasing, which greatly enhances the mechanical properties of the alloy. The hardness and tensile strength of the alloy with H210 aging condition are 165 HV and 564 MPa, respectively. During the cooling stage, in addition to the diffraction pattern of η′ phase, that of GPI zones can be observed again. Furthermore, the size of the precipitates decreases, and the volume fraction reaches a maximum. The hardness and tensile strength of the alloy with C120 aging condition reach 185 HV and 580 MPa, respectively. Furthermore, the characteristics of the grain boundary reveal that the width of precipitation free zones (PFZ) first increases during the heating stage and then decreases during the cooling stage. In the C120 condition, the newly generated secondary precipitates and the coarsening of undissolved precipitates around the grain boundary lead to the further narrowing of PFZ, but the coarse grain boundary precipitates (GBPs) are still not continuously distributed in the grain boundary. Hence, the alloy with C120 condition exhibits the most excellent corrosion resistance.

Effect of the Cyclic Extrusion and Compression Processing on Microstructure and Mechanical Properties of Al-1%Cu Alloy

2018 ◽  
Vol 780 ◽  
pp. 93-97
Author(s):  
Walaa Abdelaziem ◽  
Atef Hamada ◽  
Mohsen Abdel-Naeim Hassan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Cast Alloy ◽  
Surface Hardness ◽  
Grain Structure ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Microstructure And Mechanical Properties ◽  
Elongation To Failure

The Simple Cyclic extrusion compression (SCEC) has been developed for producing Al-1%Cu alloys with fine microstructures and superior properties. SCEC method was applied for only two-passess.It was found that the grain structure was significantly reduced from 1500 μm to 100 μm after two passes of cyclic extrusion. The ultimate tensile strength and elongation to failure of as-cast alloy were 110 MPa and 12 %, respectively. However, the corresponding mechanical properties of the two pass CEC deformed alloy are 275 MPa and 35%, respectively. These findings ensure that a significant improvement in the grain structure has been achieved. In addition, cyclic extrusion deformation increased the surface hardness of the alloy by 50 % after two passes.

Study on the Preparation Method of Nanoparticle Reinforced Copper Alloy and Mechanical Test

2013 ◽  
Vol 631-632 ◽  
pp. 568-571
Author(s):  
Lan Ying Wu ◽  
Jian Meng Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Copper Alloy ◽  
Preparation Method ◽  
Mechanical Test ◽  
Centrifugal Casting ◽  
Vacuum Melting ◽  
Bronze Alloy ◽  
Tin Bronze

In this paper,on the basis of a certain kind of Tin bronze alloy,a new nanoparticle reinforced copper alloy with additions of some alloy is produced by using vacuum melting and centrifugal casting technology.The mechanical properties of the alloy have increased significantly than the Tin bronze alloy.The tensile strength, yield strength,elongation of as-cast nanoparticle reinforced copper alloy are 477~535MPa,221~280MPa,28.0~35.6%,respectively.Compared with the conventional Tin bronze alloy, the strength and plastic of the nanoparticle reinforced copper alloy are obviously improved.

Research on High Strength Hypoeutectic Al-Si Alloy

2013 ◽  
Vol 873 ◽  
pp. 10-18
Author(s):  
Ting Ting Jia ◽  
Guo Shi Chen ◽  
Shuo Zhang ◽  
Ming Wu ◽  
Hao Ran Geng
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Yield Strength ◽  
Grain Boundary ◽  
Master Alloy ◽  
High Strength ◽  
Experimental Results ◽  
Casting Alloy ◽  
Metallic Compounds

In this study, hypoeutectic Al-Si casting alloy was investigated to obtain high strength, according to alloying of Cu Mg, refining of Al-5Ti-B master alloy, modifing of Re and T6 heat treatment. The experimental results show that the mechanical properties of the tested alloy reach peak when addition of Al-5Ti-1B alloy is 1.0% after heat treatment, especially the yield strength, correspondingly, microstructure distribution gets to the best state. When Al-5Ti-1B exceeds 1.0%, the mechanical properties descend gradually. The metallic compounds of Mg2Si phase, CuA12 phase and W phase precipitated along the grain boundary and strengthened dispersively can improve mechanical properties of the tested alloys. The yield strength of samples added 0.1% Re (La 50%, Ce 40%) increases slightly, simultaneously, the tensile strength and elongation decreases. After 0.1% Re, the mechanical properties get down.

scholarly journals Experimental evaluation of mechanical properties of friction welded mild steel

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Eko Nugroho ◽  
Eko Budiyanto ◽  
Enggal Bagus Suseno
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Mild Steel ◽  
Friction Welding ◽  
Rotation Speed ◽  
Automobile Engineering ◽  
Aeronautical Engineering ◽  
Solid State Joining ◽  
Joining Process

Friction welding is a solid state joining process used to join similar and dissimilar metals, not possible with other available welding techniques. Now a day’s Friction welding is most commonly used in industry that is aeronautical engineering, automobile engineering, submarine industry and heavy industry. In this research, an experimental setup was designed and fabricated in order to accomplish friction welded joints mild steel. Thereafter, the effect of forging pressures and rotation speed on the mechanical properties of friction welded ST 42 steels, produced by mechanical joining, have been investigated. Samples were welded under friction pressure 10 MPa by different forging pressures 25 MPa and 35 MPa with different rotation speed 1095 rpm, 1200 rpm, and 1400 rpm. The tensile strength values of the weldments were determined and evaluated. The top result is produced from sample were welded under forging pressures 35 MPa at rotation speed 1400 rpm that is tensile strength 437,27 N/mm2 and yield strength 399,75 N/mm2.Keywords : friction welding, forging pressure, tensile strength, yield strength, and elongation.

scholarly journals Melt- vs. Non-Melt Blending of Complexly Processable Ultra-High Molecular Weight Polyethylene/Cellulose Nanofiber Bionanocomposite

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 404
Author(s):  
Nur Sharmila Sharip ◽  
Hidayah Ariffin ◽  
Tengku Arisyah Tengku Yasim-Anuar ◽  
Yoshito Andou ◽  
Yuki Shirosaki ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Tensile Strength ◽  
Yield Strength ◽  
Young’S Modulus ◽  
High Molecular Weight ◽  
Melt Processing ◽  
Cellulose Nanofiber ◽  
Melt Blending ◽  
Ultra High Molecular Weight

The major hurdle in melt-processing of ultra-high molecular weight polyethylene (UHMWPE) nanocomposite lies on the high melt viscosity of the UHMWPE, which may contribute to poor dispersion and distribution of the nanofiller. In this study, UHMWPE/cellulose nanofiber (UHMWPE/CNF) bionanocomposites were prepared by two different blending methods: (i) melt blending at 150 °C in a triple screw kneading extruder, and (ii) non-melt blending by ethanol mixing at room temperature. Results showed that melt-processing of UHMWPE without CNF (MB-UHMWPE/0) exhibited an increment in yield strength and Young’s modulus by 15% and 25%, respectively, compared to the Neat-UHMWPE. Tensile strength was however reduced by almost half. Ethanol mixed sample without CNF (EM-UHMWPE/0) on the other hand showed slight decrement in all mechanical properties tested. At 0.5% CNF inclusion, the mechanical properties of melt-blended bionanocomposites (MB-UHMWPE/0.5) were improved as compared to Neat-UHMWPE. It was also found that the yield strength, elongation at break, Young’s modulus, toughness and crystallinity of MB-UHMWPE/0.5 were higher by 28%, 61%, 47%, 45% and 11%, respectively, as compared to the ethanol mixing sample (EM-UHMWPE/0.5). Despite the reduction in tensile strength of MB-UHMWPE/0.5, the value i.e., 28.4 ± 1.0 MPa surpassed the minimum requirement of standard specification for fabricated UHMWPE in surgical implant application. Overall, melt-blending processing is more suitable for the preparation of UHMWPE/CNF bionanocomposites as exhibited by their characteristics presented herein. A better mechanical interlocking between UHMWPE and CNF at high temperature mixing with kneading was evident through FE-SEM observation, explains the higher mechanical properties of MB-UHMWPE/0.5 as compared to EM-UHMWPE/0.5.

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