Effects of pre-aging treatment on subsequent artificial aging characteristics of Al-3.95Cu-(1.32Mg)-0.52Mn-0.11Zr alloys

2015 ◽  
Vol 22 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Yi-feng Wu ◽  
Ming-pu Wang ◽  
Zhou Li ◽  
Fu-zhong Xia ◽  
Cheng-dong Xia ◽  
...  
Keyword(s):  
Artificial Aging ◽  
Aging Treatment

Effect of Artificial Aging on Microstructures and Mechanical Properties of Extruded Mg Alloy ZK60

2014 ◽  
Vol 697 ◽  
pp. 72-75
Author(s):  
De Liang Yin ◽  
Jian Qiao ◽  
Hong Liang Cui
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Aging Time ◽  
Artificial Aging ◽  
Aging Treatment ◽  
Tensile Tests ◽  
Tensile Yield Strength ◽  
Uniaxial Tensile ◽  
Fracture Elongation ◽  
Strength And Ductility

An extruded ZK60 magnesium alloy was subjected to artificial aging at 180 oC for an investigation of the effect of aging time on its precipitation behavior and mechanical properties. Uniaxial tensile tests were conducted to obtain the mechanical properties. Optical microscopy and transmission electron microscopy (TEM) were employed to observe microstructure change before and after aging treatment. It is shown that, both tensile yield strength and ultimate tensile strength increases with aging time. The fracture elongation after aging for 20 h reaches up to 21.0%, and the yield strength increases to 269.5 MPa, 19.4% higher than that of extruded specimens (un-aged), showing a good match of strength and ductility. Three newly-formed precipitates were observed after aging for over 20 h, among which particulate and dispersive precipitates should be responsible for the good combination of strength and ductility.

Fatigue Behavior Improvement of A356 Aluminum Alloy of Motorcycle Cast Wheel Produced by High Speed Centrifugal Casting Based on T6 Heat Treatment and Artificial Aging

2020 ◽  
Vol 991 ◽  
pp. 86-93
Author(s):  
Priyo Tri Iswanto ◽  
Akhyar Hasan ◽  
Aditya Janata ◽  
Luthfi Muhammad Mauludin ◽  
Hizba Muhammad Sadida
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
High Speed ◽  
Artificial Aging ◽  
Fatigue Behavior ◽  
Centrifugal Casting ◽  
Aging Treatment ◽  
A356 Aluminum Alloy ◽  
T6 Heat Treatment ◽  
A356 Aluminum

Fatigue behavior of A356 aluminum alloy for motorcycle rim was experimentally investigated based on T6 heat treatment and artificial aging. The high speed of 1,100 rpm from centrifugal casting was used in this study. The pouring temperature at 750 °C was employed and the preheated temperature at 250 °C was applied on the mold. The solution heat treatment of the sample was conducted for 4 hours at 540 o C before it immersed into the water for rapid cooling at room temperature. This step followed by natural aging treatment at 30 °C and artificial aging treatment at 150 °C, 175 °C, and 200 °C for 2 hours, respectively. It is found that increasing centrifugal casting speed into 1,100 rpm combined with heat treatment and artificial aging temperature can significantly increase not only its mechanical properties but also the fatigue life of motorcycle wheel made of A356 aluminum alloy. This experiment proved that the lowest fatigue crack growth rate obtained with this method was at temperature of 175°C.

Thermocatalytic Degradation of Low Density Polyethylene Films at Artificial Aging Treatment under Lower Temperature

2014 ◽  
Vol 804 ◽  
pp. 43-46
Author(s):  
Si Zhao Zhang ◽  
Xue Guang Luo ◽  
Feng Ding ◽  
Ke Li ◽  
Xiao Yan Lin ◽  
...  
Keyword(s):  
Artificial Aging ◽  
Aging Treatment ◽  
Degradation Process ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ft Ir ◽  
Lower Temperature ◽  
Chemical Groups

Low density polyethylene (LDPE) films added thermal catalyst were investigated at artificial aging time of 0, 10, 20, and 30 days, respectively. The samples obtained were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), gel permeation chromatograph (GPC) and fourier transform infrared spectroscopy (FT-IR). It shows that the surface of film was destroyed via thermocatalytic reactions at lower temperature. In addition, the changes of chemical groups were also observed in the thermocatalytic degradation process. Thus, the validation to the thermocatalytic route has been confirmed over lower temperature excitation. It is hoped that our work may provide a new insight into the degradation of polymeric films at lower temperature.

Machinability of A356 cast alloys under the effect of artificial aging treatment and lubrication modes

JMST Advances ◽  
2021 ◽  
Author(s):  
M. A. Alliche ◽  
A. Djebara ◽  
Y. Zedan ◽  
V. Songmene
Keyword(s):  
Artificial Aging ◽  
Aging Treatment ◽  
Cast Alloys

scholarly journals T4 and T6 Treatment of 6061 Al-15 Vol. % SiCP Composite

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
S. Rajasekaran ◽  
N. K. Udayashankar ◽  
Jagannath Nayak
Keyword(s):  
Room Temperature ◽  
Artificial Aging ◽  
Brinell Hardness ◽  
Natural Aging ◽  
Aging Treatment ◽  
Temperature History ◽  
Peak Hardness ◽  
Aging Behavior ◽  
Hardness Variation ◽  
Peak Aging

Aging temperature history has profound effect on the mechanical and corrosion behavior of 6061 Al/SiC composite. In order to understand the effect of aging on the corrosion resistance, the natural and artificial aging behavior of 15 vol. % 6061 Al-SiCP composites was studied using the aging treatment and the Brinell hardness measurements. The aging curves for the composite (T6 treated) were determined at various aging temperatures such as room temperature, 140, 160, 180, 200, 220, and 240°C. According to the peak hardness variation with temperature profile, it is found that the composite is underaged at 140°C and 160°C. Peak aging takes place at 180°C. Overaging takes place at 200°C, 220°C, and 240°C. The natural aging characteristics of the composite (T4 treated) are also studied using the Brinell hardness measurements.

Study on Microstructure and Property of Al-Si-Cu-Mg Casting Alloy during Solution and Aging Treatment

2014 ◽  
Vol 915-916 ◽  
pp. 650-653
Author(s):  
Li Jun Wei ◽  
Bo Long Li ◽  
Liu Yi Guan ◽  
Zuo Ren Nie
Keyword(s):  
Solid Solution ◽  
Artificial Aging ◽  
Treatment Process ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Solution Time ◽  
Casting Alloy ◽  
The Matrix ◽  
Optimum Heat ◽  
Optimum Heat Treatment

The effect of the alloying elements Cu and Mg, the solution and artificial aging process on the microstructure and property were investigated. Solution treatment was carried out at 535 ± 5°C in different time for the Al-Si-Cu-Mg casting alloy, and the artificial aging was carried out at 160 ± 5°C and 175 ± 5°C and190 ± 5°C in different time. The microstructure has been investigated by Optical Microscopy, Scanning Electron Microscopy (SEM). We found that most of Cu and Mg element in the alloy gathered and formed multivariate composite phase at grain boundaries. With the increasing of solid solution time, the intermetallic phases will be dissolution into the matrix, and if the solid solution time is long enough, they will be distributed uniformly in alloy. With the increase of the aging temperature, the time for aging peak will be shorter, but the peak will be lower. Finally, we determine the optimum heat treatment process is 535°C × 12h + 175°C × 8h。

Optimization of multistage artificial aging parameters on Al-Cu alloy mechanical properties

2018 ◽  
Vol 2 (87) ◽  
pp. 62-67
Author(s):  
D.I. Tsamroh ◽  
P. Puspitasari ◽  
A. Andoko ◽  
A.A. Permanasari ◽  
P.E. Setyawan
Keyword(s):  
Heat Treatment ◽  
Artificial Aging ◽  
Research Result ◽  
Aging Treatment ◽  
Optimal Level ◽  
Holding Time ◽  
Design Parameters ◽  
Aging Research ◽  
Cu Alloy ◽  
The Impact

Purpose: This research is aimed to describe heat treatment process by using multistage artificial aging for Al-Cu alloy with Taguchi method in Minitab 16 to optimize the heat treatment parameters. This research conducted due to the applied of aluminium alloy in automotive industrial and aircraft industrial that has good properties for fabrication. Design/methodology/approach: Methodology that use in this paper is experimental design with statistical approach. Three controllable parameters were selected, they were temperature aging, holding time of aging, and the number of stages. The hardness value and impact value after multistage artificial aging were chosen as quality characteristics. The experiment was performed using orthogonal arrays of L9 (33). Findings: The finding that resulted in this research are the most significant parameters that affected hardness and toughness value of Al-Cu alloy against multistage artificial aging. The optimal hardness and toughness for Al-Cu alloy were obtained with heat treatment at temperature 200ºC, holding time for 6 hours, with two stages artificial aging. Research limitations/implications: The limitation that found in this research is even optimal level had been determined, it is unable to determine the true optimal value of each design parameters. Practical implications: This optimization process can be applied in manufacture process in industrial without spend expensive cost and time. Originality/value: According to research result, can be understood that by conducting these experiments, the impact value and the hardness value of Al-Cu alloy increase with multistage artificial aging treatment.

scholarly journals High-throughput proteome analysis reveals changes of primary metabolism and energy production under artificial aging treatment in Glycine max seeds

2016 ◽  
Vol 59 (6) ◽  
pp. 841-853 ◽  
Author(s):  
Cheol Woo Min ◽  
Yu Ji Kim ◽  
Ravi Gupta ◽  
So Wun Kim ◽  
Won Young Han ◽  
...  
Keyword(s):  
Glycine Max ◽  
High Throughput ◽  
Energy Production ◽  
Artificial Aging ◽  
Aging Treatment ◽  
Proteome Analysis ◽  
Primary Metabolism

scholarly journals Peening Natural Aging of Aluminum Alloy by Ultra-High-Temperature and High-Pressure Cavitation

2021 ◽  
Vol 11 (7) ◽  
pp. 2894
Author(s):  
Toshihiko Yoshimura ◽  
Masayoshi Iwamoto ◽  
Takayuki Ogi ◽  
Fumihiro Kato ◽  
Masataka Ijiri ◽  
...  
Keyword(s):  
Residual Stress ◽  
High Pressure ◽  
Aluminum Alloy ◽  
High Temperature ◽  
Compressive Residual Stress ◽  
Artificial Aging ◽  
Solution Treatment ◽  
Natural Aging ◽  
Aging Treatment ◽  
Ultra High Temperature

The peening solution treatment was performed on AC4CH aluminum alloy by ultra-high-temperature and high-pressure cavitation (UTPC) processing, and the peening natural aging was examined. Furthermore, peening artificial aging treatment by low-temperature and low-pressure cavitation (LTPC) was performed, and the time course of peening natural aging and peening artificial aging were compared and investigated. It was found that when the AC4CH alloy is processed for an appropriate time by UTPC processing, compressive residual stress is applied and natural aging occurs. In addition, the UTPC processing conditions for peening natural aging treatment with high compressive residual stress and surface hardness were clarified. After peening artificial aging by LTPC processing, the compressive residual stress decreases slightly over time, but the compression residual stress becomes constant by peening natural aging through UTPC treatment. In contrast, it was found that neither natural nor artificial peening natural aging occurs after processing for a short time.

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