scholarly journals The influence of isochronal aging on the mechanical and thermophysical properties of the EN AW-6060 aluminum alloy

2019 ◽  
Vol 51 (3) ◽  
pp. 372-377
Author(s):  
U. Stamenković ◽  
S. Ivanov ◽  
I. Marković
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Electrical Conductivity ◽  
Aluminum Alloy ◽  
Thermal Properties ◽  
Gradual Increase ◽  
Aging Treatment ◽  
Precipitated Phases ◽  
Insight Into

The scope of this paper is the investigation of the effect of precipitation on an EN AW-6060 aluminum alloy by measuring mechanical, physical, and thermal properties. According to the exothermic peaks that appeared on the DSC thermogram and thermal diffusivity curve, parameters for isochronal aging treatment were defined. Thermal, mechanical, physical, and structural properties were investigated during the isochronal aging. The maximal enhancement of mechanical properties was achieved after aging at 230 °C for 30 min, whereas the most favorable thermal properties were obtained after aging at the same temperature for 60 min. During the aging, the precipitation from the solid solution caused a gradual increase in electrical conductivity. SEM/EDS microstructural investigations confirmed the existence of precipitated phases and provided the insight into their distribution within the microstructure. Keywords: aluminum alloys, EN AW-6060, aging, heat treatment, thermal properties

Investigation on the Influence of Precipitated Phase on Corrosion Resistance of the Ni-Based Alloys

2012 ◽  
Vol 184-185 ◽  
pp. 1038-1043
Author(s):  
Xue Hui Zhao ◽  
Zhen Quan Bai ◽  
Yao Rong Feng ◽  
An Qing Fu
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Corrosion Resistance ◽  
Electron Microscope ◽  
Grain Boundaries ◽  
Aging Treatment ◽  
Treatment Temperature ◽  
Different Temperatures ◽  
Metallographic Observation ◽  
Precipitated Phases

The influence of precipitated phases in Ni-based alloys during solid solution aging treatment on the performance of Ni-based alloys was investigated by means of metallographic observation, scanning electron microscope (SEM), and transmission electron microscope (TEM). The variation of microstructure and resultant phases as a result of solid solution aging treatment at different temperatures was discussed. The results show that the heat treatment temperature has significant influences on the type as well as quantity of precipitation phases. Lots of phases precipitated at grain boundaries, the distribution of precipitated phases are characterized by mesh-like structure. The corrosion tests results indicate that there is a potential difference between grains and grain boundaries due to the precipitation of chrome carbide at grain boundaries, resulting in pitting corrosion occurred preferentially at grain boundaries, consequently, the corrosion resistance of Ni-based alloys is reduced. In order to enhance the corrosion resistance of Ni-based alloys, it is expected to control the carbon content in a lower range and proper heat treatment process to avoid large amount precipitation of chrome carbide.

Influence of Yttrium and Heat Treatment on Microstructure and Mechanical Properties of AM60 Alloy

2011 ◽  
Vol 194-196 ◽  
pp. 1319-1325
Author(s):  
Zheng Tian ◽  
Zhan Yi Cao ◽  
Jian Meng
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Yield Strength ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Hardness Measurement ◽  
X Ray ◽  
Solid Solution Treatment ◽  
Yttrium Addition

The effect of yttrium addition and heat treatment on the mechanical properties and microstructure of AM60 magnesium alloy have been investigated using X-ray phase analysis, microstructure investigation, tensile test, hardness measurement and fracture surfaces analysis. The results showed that the mechanical properties of the alloys were obviously improved with the addition of yttrium no more than 1.0%. The reinforcement of the alloys resulted from the appearance of Al2Y phase. After solid-solution treatment (T4), the Mg17Al12 phase almost dissolved in Mg matrix, but the rare earth compounds Al2Y phase was rather stable. The ultimate tensile strength σb was improved, but the yield strength σ0.2 and elongation δ were only slightly changed. After solid-solution + aging treatment (T6), the Mg17Al12 phase precipitated again and their morphology was changed. The yield strength σ0.2 was improved.

Effect of Stepped Aging Treatment on Microstructure and Properties of AA7085 Aluminum Alloy

2011 ◽  
Vol 228-229 ◽  
pp. 968-974 ◽  
Author(s):  
Chun Mei Li ◽  
Zhi Qian Chen ◽  
Su Min Zeng ◽  
Nan Pu Cheng ◽  
Quan Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Heat Treatment ◽  
Electrical Conductivity ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Aging Treatment ◽  
Tensile Fracture ◽  
X Ray ◽  
Thermodynamic Factors

The effect of stepped aging treatment including two-stepped retrogression aging and retrogression reaging treatment on the mechanical properties, electrical conductivity and the microstructure of AA7085 has been investigated. Electron microscopy observations were used to analyze the microstructures and tensile fracture surfaces of AA7085 processed via various treatment schedules. Besides, X-ray diffractometer and differential scanning calorimeter were used to explore the thermodynamic factors of heat treatment. Through the investigation of the effect of the retrogression time on the properties and microstructure of AA7085, the optimized retrogression time was confirmed. The results of comparing retrogression aging and retrogression reaging treatment showed that through RRA treatment, higher conductivity and fracture toughness were gained. Through the optimized RRA treatment based on appropriate retrogression time, the tensile strength, elongation, fracture toughness and conductivity of AA7085 were raised to 660MPa, 12%,36.6MPa•m1/2and 38.1%IACS.

scholarly journals Investigation of the Effect of Heat Treatment on the Microstructures and Mechanical Properties of Al-13Si-5Cu-2Ni Alloy

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 688
Author(s):  
Zhi-Fa Wang ◽  
Tian-Jing Miao ◽  
Shu-Qing Kou ◽  
Shuang Zhang ◽  
Feng Qiu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Cast Alloy ◽  
Eutectic Silicon ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Solution Treatment Temperature ◽  
Solid Solution Treatment ◽  
Microstructures And Mechanical Properties

An experimental investigation was carried out to study the effects of solid solution treatment and aging treatment on the microstructures and mechanical properties of an Al-13Si-5Cu-2Ni alloy. The results show that the size of eutectic silicon decreased with solid solution treatment temperature increasing until 510 °C. Subsequently, the eutectic silicon size continued to increase as the temperature increased to 520 °C. Initially, the acicular eutectic silicon of the as-cast alloy was 10.1 μm in size. After the solid solution treatment at 510 °C, the eutectic silicon size was reduced to 6.5 μm. The θ′ phase is the main strengthening phase in the alloy, therefore, the effect of aging treatment on θ′ phases was explored. As the aging time increased, the diameter, length, and fraction volume of the θ′ phases were found to increase. The main reason for the improved performance of this alloy following heat treatment is the passivation spheroidization of the silicon phase and Orowan strengthening due to the θ′ phases. The optimal tensile strength of an Al-13Si-5Cu-2Ni alloy was obtained after solid solution treatment at 510 °C for 8 h followed by an aging treatment at 165 °C for 8 h. Therefore, this work has great significance for promoting the application of Al alloys at high temperatures.

HRTEM Analysis of Aging Electrolytic Low-Ti Al Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 1015-1020
Author(s):  
Wen Yan Wang ◽  
Jing Pei Xie ◽  
Wei Li ◽  
Zhong Xia Liu
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Electron Microscope ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Tensile Fracture ◽  
Al Alloy ◽  
Mg2si Phase ◽  
Β Phase ◽  
Precipitated Phases

Electronic tensile testing, scanning electron microscope, transmission electron microscope, X-ray diffractometer and high resolution transmission microscope were employed to investigate the mechanical properties, microstructure, tensile fracture and morphology of the precipitated phases of an electrolytic low-titanium wrought 6009 aluminum alloy. Results showed that the mechanical properties of the electrolytic aluminum sheet were improved by solid solution treatment incorporating with pre-aging treatment. The tensile strength and extensibility were enhanced by a factor of 23% and 38% by pre-aging treatment at 150 °C for 5 minutes respectively; a large quantity of nucleation sites of β˝ phase were generated by pre-aging treatment, which was propitious to the transformation from solid solution state to GP zone, and the stable size of GP zone formed during the pre-aging process promoted the precipitation of Mg2Si phase. The Mg2Si phase was revealed by HRTEM and the crystalline stripes were obtained by Fourier transformation.

Effects of Heat Treatment on Microstructure and Mechanical Properties of Rolled AM50+xCa Magnesium Alloys

2005 ◽  
Vol 488-489 ◽  
pp. 257-260 ◽  
Author(s):  
Jianguo Peng ◽  
Qu Dong Wang ◽  
Man Ping Liu ◽  
Yongjun Chen ◽  
Wen Jiang Ding ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Tensile Properties ◽  
Magnesium Alloys ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Secondary Phase ◽  
Solid Solution Treatment ◽  
Microstructure And Mechanical Properties

Effects of solution and aging treatment on microstructure and mechanical properties of rolled AM50+xCa alloys(x=0, 1, 2 wt. %) were studied. The results indicated that, with increasing solution time i, the secondary phase Mg17Al12 was dissolved into the Mg matrix and Al2Ca became thinner and shorter, then gradually broken and spheroidized.With an increase of aging time, Mg17Al12 precipitated from the Mg matrix in the form of particles and Al2Ca changed a little. After solution treatment, hardness and tensile properties of the alloy’s decreased. After the aging treatment, the alloy’s hardness increased first and decreased later while the tensile properties increased little. The solution and aging treatment can increase the ductility of AM50 and AM50+1Ca alloys. For AM50+2Ca alloy, the ductility increased after solid solution treatment and decreased after aging treatment.

Influence of Heat Treatment on the Microstructures and Properties of Mg-12Li-3Gd-3Y-0.6Zr Alloy

2013 ◽  
Vol 800 ◽  
pp. 375-378
Author(s):  
Jian Feng ◽  
Jin Liang Huang ◽  
Yu Xin Jia
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Tensile Strength ◽  
Tensile Test ◽  
Optical Microscopy ◽  
Phase Structure ◽  
Aging Treatment ◽  
Argon Atmosphere ◽  
X Ray

A new kind of Mg-12Li-3Gd-3Y-0.6Zr alloys was prepared in vacuum conditions with the protection of argon atmosphere. The effects of heat treatment on the microstructure and mechanical properties of Mg-12Li-3Gd-3Y-0.6Zr alloy were studied by optical microscopy, SEM, XRD and tensile test. The results show that the highest tensile strength of the alloy reaches 142MPa after aging treatment at 373K for 2h, and the best elongation of the alloy reaches 54% after solid solution and aging treatment at 673K for 2h + 373K for 2h. The X-ray analysis of the investigated alloy shows that the phase structure of the investigated alloy is β-Li, Mg2Gd and Mg24Y5.

Influence of Heat Treatment Parameters on Mechanical Properties and Crashworthiness of Aluminum Crash Box

2014 ◽  
Vol 912-914 ◽  
pp. 194-199
Author(s):  
Jia Zhou ◽  
Guang Yao Wang ◽  
Yang Li ◽  
Xin Ming Wan
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Energy Absorption ◽  
Static Pressure ◽  
Aging Treatment ◽  
The Other ◽  
Solution Temperature ◽  
Optimal Heat Treatment ◽  
Temperature Solution

The influence of heat treatment parameters, i.e. solution temperature, solution time, aging temperature and aging treatment on the mechanical properties and crashworthiness of crash boxes produced with 6101 aluminum alloy were studied. The optimal heat treatment processing was obtained as follows: 510°C×45min+175°C×7h. The crash boxes were treated under different heat treatments, i.e. T1 temper,T4 temper and T6 temper and then compressed under static pressure. The results indicate that the energy absorption of crash box can after T6 treatment is significantly higher than the samples under T1temper and T4 temper, which have similar energy absorption. The peak force of static pressure crash boxes treated under T6 temper is obviously higher than the other two tempers.

UNS A97075

Alloy Digest ◽  
1986 ◽  
Vol 35 (7) ◽  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Good Resistance ◽  
Temperature Performance ◽  
Structural Applications ◽  
Structural Parts ◽  
Very High

Abstract UNS No. A97075 is a wrought precipitation-hardenable aluminum alloy. It has excellent mechanical properties, workability and response to heat treatment and refrigeration. Its typical uses comprise aircraft structural parts and other highly stressed structural applications where very high strength and good resistance to corrosion are required. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on low temperature performance as well as forming, heat treating, and machining. Filing Code: Al-269. Producer or source: Various aluminum companies.

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