scholarly journals Study on Microstructure, Mechanical Properties and Erosion Characteristics of Al-Si Alloy Manufactured by Continuous Casting Direct Rolling Process

2021 ◽  
Vol 11 (18) ◽  
pp. 8351
Author(s):  
Bo-Chin Huang ◽  
Kai-Chieh Chang ◽  
Fei-Yi Hung
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Continuous Casting ◽  
Cold Rolling ◽  
Aging Treatment ◽  
Impact Angle ◽  
Raw Material ◽  
Al Alloy ◽  
Direct Rolling ◽  
Al Matrix

Al-Si alloys exhibit promising wear resistance, thus being mainly employed to weld Al alloy parts and processed into components of equipment. During the new continuous casting direct rolling (CCDR) process, the raw material gradually cools and solidifies, simultaneously plastically deformed. Hence, the materials manufactured through the CCDR process presented an unparalleled microstructure. The experimental results indicated that the strength of the CCDR Al-Si alloy can be increased through cold rolling. A two-stage heat treatment (solid solution and aging treatment) was introduced to improve the ductility and satisfy the industrial application. Furthermore, the erosion wear characteristics and fracture mechanism of the CCDR Al-Si alloy dominated by the ductility were confirmed. Both cold rolling specimens (FR) and those with heat treatment (FRH) showed greater wear resistance than as-manufactured (F). The FR specimens exhibited greater wear resistance owing to a higher Al matrix strength at a lower impact angle; on the other hand, at a higher impact angle, the FRH specimens with a softer Al matrix presented better wear resistance due to the formation of a lip structure to reduce material removal. The TEM results confirmed that the nanoscale grains formation was induced in the erosion-affected region and affected the Si concentration. Conclusively, the heat-treated CCDR Al-Si alloy possessed excellent erosion resistance and workability, which can serve as a reference processed as wear-resistant mechanical parts.

Wear Resistance of Pre-ECAP Annealing A356 Al Alloy with 1.5 Wt.% TiB2

2019 ◽  
Vol 961 ◽  
pp. 118-125
Author(s):  
Muhammad Syukron ◽  
Zuhailawati Hussein ◽  
Abu Seman Anasyida
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Optical Microscopy ◽  
Al Alloys ◽  
Wear Testing ◽  
Al Alloy ◽  
Hardness Distribution ◽  
Grain Refiner ◽  
Ecap Processing

The combination of heat treatment, addition of grain refiner and ECAP processing is used to improve mechanical properties and wear resistance of A356 Al alloys with 1.5 wt.% TiB2. The alloys were grouped into as-cast and pre-ECAP annealing. The alloys were characterized with hardness and wear testing, optical microscopy and SEM. The ECAP processing was done through BA route for 4 passes and it improved hardness, distribution of TiB2 and Si particles in the aluminium matrix and increased wear resitance of pre-ECAP annealing specimen.

Microstructure and Wear Property of Zn-Al Alloy Reinforced with Carbonized Rice Husks

2012 ◽  
Vol 463-464 ◽  
pp. 494-498
Author(s):  
Su Qiu Jia ◽  
Yun Hai Ma ◽  
Jin Tong ◽  
Guo Jun Liu
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
The State ◽  
Al Alloy ◽  
Wear Property ◽  
Rice Husks ◽  
Semi Solid

Zn-Al composites with carbonized rice husks were prepared by permanent mould. Microstructure and wear property of Zn-Al composites were measured under the condition of as-cast heated at 375 °C and 430 °C corresponding to solid and semi-solid range. The microstructure of as-cast, heated at 375 °C and 430 °C were different. The microstructure of as-cast Zn-Al alloy revealed primary a dendrites (α) and eutectoid α+η (α,rich Al, η rich Zinc)phases. The microstructure of ZA alloy with carbonized rice husks was fine dendrites for heated at 375 °C and second and third dendrites were almost dispersed. After semi-solid treatment, the microstructure of Zn-Al composites presented quasi-round or round and large with time prolonger. The hardness of Zn-Al composites rose with carbonized rice husks and increased slightly by heat treatment. Wear resistance of Zn-Al composites with carbonized rice husks improved significantly and increased with carbonized rice husks. But at the same amount of carbonized rice husks the wear resistance of the composite varied little regardless of being in the state of as-cast or heat treatment.

Simulation and Experimental Mechanical Properties of SiCn/2024 Al Alloy Co-Continuous Composites

2013 ◽  
Vol 712-715 ◽  
pp. 997-1001 ◽  
Author(s):  
Yi Wei Qin ◽  
Sen Kai Lu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Cycle Fatigue ◽  
Elasticity Modulus ◽  
Failure Strain ◽  
Simulated Data ◽  
Al Alloy ◽  
Cycle Fatigue ◽  
Simulation Code ◽  
Al Matrix

The experimental and numerical simulations of mechanical properties of co-continuous composites SiCn/Al produced by infiltration of SiC preforms with melted 2024 Al alloy using Solidwork2012 Simulation code were carried out. The results showed that ultimate tensile strengths of SiCn/Al up to 410 MPa at a failure strain of up to 0.7% without any heat treatment. The compression strength was up to 710 MPa with 2% strain to failure. The composites show an excellent resistance to high cycle fatigue. Fatigue life for specimen was 4.5×105cycles for 250 MPa while R=-1.0, and 4.9×105cycles for 164 MPa while R=-0.05. Simulated data shows there is different mechanical behavior between SiC structs and Al matrix, difference of elasticity modulus of two constituents occasion difference of generated deflection, Al has taken place large deformation; Due to structural characteristic of SiC, the force on each rib affects other adjacent rib, Al and SiC restrict each other to prevent from producing the strain.

Influences of Solution Treatment, Deformation Strain, and Nanometric Al2O3 Particulate on Dry Wear Properties for Nanometric Al2O3 Particulate Reinforced Al Alloy Matrix Composites Manufactured by Casting

2012 ◽  
Vol 628 ◽  
pp. 3-6
Author(s):  
Yong Biao Yang ◽  
Zhi Min Zhang ◽  
Xing Zhang
Keyword(s):  
Wear Resistance ◽  
Solution Treatment ◽  
Solution Temperature ◽  
Al Alloy ◽  
Matrix Composites ◽  
Wear Properties ◽  
Alloy Matrix ◽  
Deformation Strain ◽  
Particulate Reinforced ◽  
Al Matrix

The influences of solution treatment, deformation strain, and nanometric Al2O3 particulate on dry wear properties for nanometric Al2O3 particulate reinforced Al alloy matrix Composites manufactured by casting were investigated. The result showed that both the wear resistance of AL matrix and the composites increased rapidly with increasing solution temperatures. The wear resistance increased slightly with increasing deformation strain for the composites. The wear resistance of the composites is higher than the AL matrix after the same deformation and heat treatment. Microstructure observation revealed that the grain sizes of the composites increased with increasing solution temperature and decreased with more severe deformation. Abrasive wear was the main wear mechanism both for the AL matrix and the composites.

Microstructure and Mechanical Properties of 7000 Series Al Alloy via Tiny-Molten-Pool Solidification Forming

2016 ◽  
Vol 850 ◽  
pp. 664-670
Author(s):  
Qi Zhao Shen ◽  
Jing Ye Jiao ◽  
Ai Chao Cheng ◽  
Ren Fei Guo ◽  
Tie Tao Zhou
Keyword(s):  
Heat Treatment ◽  
Cold Rolling ◽  
Molten Pool ◽  
Base Plate ◽  
Eutectic Structure ◽  
Al Alloy ◽  
Forming Process ◽  
Uniform Size ◽  
T6 Heat Treatment ◽  
7075 Al Alloy

As the grains of 7000 series Al alloy prepared by traditional casting method are usually quite coarse, and there exists serious segregation of composition and structure in the alloy, a new forming process for high-alloying alloy is in urgent need. Here we demonstrate a new method called tiny-molten-pool solidification forming to improve the above mentioned problems. In detail, the alloy powder was melt by the plasma and then deposits on the base plate. 7075 Al alloy bulk specimens with the size of about 200 mm × 8 mm × 4 mm were prepared and the effects of homogenizing treatment, cold rolling, T6 heat treatment for the alloy were studied. The results show that there were no oxide film inclusions in the single-pass multi-layers specimen prepared by AC tiny-molten-pool solidification forming, and the microstructure was homogeneous; The grains were homogeneous and mainly equiaxed grains with a uniform size of about 20 μm, which were much smaller than that of traditional casting 7075 Al alloy; After the homogenization treatment (470 °C × 48 h), most of the net-shape eutectic structure in the alloy is re-dissolved. After cold rolling with a total deformation of 60%, the alloy became compact as the stomata were compressed. The hardness of the alloy was HV183.51 after T6 heat treatment (480 °C × 2 h + 120 °C× 15 h). The micro-molten-pool solidification forming is feasible for the forming of bulk 7000 series Al alloy.

scholarly journals Microstructure and Service Properties of Copper Alloys

2016 ◽  
Vol 61 (3) ◽  
pp. 1277-1282
Author(s):  
M. Polok-Rubiniec ◽  
J. Konieczny ◽  
K. Labisz ◽  
A. Włodarczyk-Fligier
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Plastic Deformation ◽  
Wear Resistance ◽  
Cold Rolling ◽  
Cold Working ◽  
Supersaturated Solid Solution ◽  
Copper Alloys ◽  
Test Material ◽  
Cold Plastic Deformation

Abstract This elaboration shows the effect of combined heat treatment and cold working on the structure and utility properties of alloyed copper. As the test material, alloyed copper CuTi4 was employed. The samples were subjected to treatment according to the following schema: 1st variant – supersaturation and ageing, 2nd variant – supersaturation, cold rolling and ageing. The paper presents the results of microstructure, hardness, and abrasion resistance. The analysis of the wipe profile geometry was realized using a Zeiss LSM 5 Exciter confocal microscope. Cold working of the supersaturated solid solution affects significantly its hardness but the cold plastic deformation causes deterioration of the wear resistance of the finally aged CuTi4 alloy.

scholarly journals Effect of Fabrication Processes on the Deformation and Fracture Behaviour of Sic/Al Composites

2002 ◽  
Vol 11 (4) ◽  
pp. 096369350201100
Author(s):  
Boxiong Ding ◽  
J. L. Ding ◽  
Stephen D. Antolovich ◽  
S. C. Cho
Keyword(s):  
Heat Treatment ◽  
Fracture Behaviour ◽  
Matrix Material ◽  
Al Alloy ◽  
Fracture Properties ◽  
Microstructural Parameters ◽  
Deformation And Fracture ◽  
Heat Treated ◽  
Sic Reinforcement ◽  
Al Matrix

The purpose of this research is to investigate the effects of microstructural parameters as a result of three different processing methods on the deformation and fracture properties of SiC/Al composites. The influences of heat treatment are also investigated. It was found that without heat treatment, the SiC reinforcement phase significantly improved the strength of the composite compared to the Al matrix material. However, the strengths of the heat-treated composites were roughly in the same range as those of heat-treated Al alloy. The ball-milled composite has higher strength, but lower fracture toughness compared to the powder and flake composites. Between the latter two, the powder composite has higher toughness.

Effect of Heat Treatment on Microstructure, Hardness and Wear of Aluminum Alloy 332

2015 ◽  
Vol 786 ◽  
pp. 18-22 ◽  
Author(s):  
Fizam Zainon ◽  
Khairel Rafezi Ahmad ◽  
Ruslizam Daud
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Aluminum Alloy ◽  
Room Temperature ◽  
Eutectic Silicon ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Room Temperature Aging ◽  
Temperature Aging ◽  
Silicon Particles

This paper describes a study on the effects of heat treatment on the microstructure, hardness and wear of aluminum alloys 332 (AlSi9Cu3Mg). The solution treatment was performed at 500°C for 5 hours and then quenched in water at room temperature. Aging was performed at 170°C for 2 hours. The findings revealed that after a full heat treatment, the structure of the eutectic silicon formed toward fragmentation and spheroidization, and the silicon particles became coarse (look-like rounded). Hard intermetallic compound (Mg2Si) appeared on the microstructure after the aging treatment completed. Compared to the as-cast, the hardness of the alloys has improved to 44.84%, and the wear rate of the solution treatment had decreased to 26% while the aging treatment showed a deterioration of 79.42%. The study concludes that aging treatment improves the hardness of AA332 alloys and enhanced the wear resistance of the substance.

scholarly journals Pengaruh Debit Air Pendingin pada Proses Flame Heating terhadap Sifat Fisis dan Mekanik Aluminium 7075

2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Ghailan Wicaksana ◽  
Teguh Triyono ◽  
Nurul Muhayat
Keyword(s):  
Heat Treatment ◽  
Impact Test ◽  
Aging Treatment ◽  
Treatment Phase ◽  
Hardness Test ◽  
Flow Speed ◽  
Raw Material ◽  
Heating Process ◽  
Flame Heating ◽  
Specimen Test

Aluminum alloy 7075 is a combination that are consists of 5,5% Zn, 2,5% Mn, 1,5% Cu, 0,3% Cr and 0,2% Mn. Heat treatment phase is using flame heating method. There are 3 steps of dissolution in flame heating process. The first is heat treatment solution in the temperature between 450-500°C. The second is quenching phase using flow speed variation 1000; 1200 and 1400 cc/minute and the third phase is using aging which to hold the room temperature until reaching 120°C. Specimen test phase using vickers hardness test, micro structure and impact test. Flame heating treatment process in 1000 cc/minute quenching cause specimen become harder, using hardness test 93,43 VHN is achieved. With additional aging treatment, the hardness increase to 152,63 VHN and almost close 153,80 VHN raw material. The biggest Impact test value is gained from the result of flame heating without aging with cooling flow variation of 1000 cc/minute is 0,630 J/mm².

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