scholarly journals Effect of high-speed impact compression on natural aging and subsequent artificial aging of a 6061 aluminum alloy

2015 ◽  
Vol 65 (12) ◽  
pp. 617-621
Author(s):  
Tomo Ogura ◽  
Keitaro Horikawa ◽  
Yuki Kitani ◽  
Mami Mihara ◽  
Seongnyeong Kim ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Artificial Aging ◽  
Natural Aging ◽  
Impact Compression ◽  
6061 Aluminum Alloy ◽  
High Speed Impact

scholarly journals Effect of High-Speed Impact Compression on Natural Aging and Subsequent Artificial Aging of a 6061 Aluminum Alloy

2016 ◽  
Vol 57 (8) ◽  
pp. 1282-1286
Author(s):  
Tomo Ogura ◽  
Keitaro Horikawa ◽  
Yuki Kitani ◽  
Mami Miara ◽  
SeongNyeong Kim ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Artificial Aging ◽  
Natural Aging ◽  
Impact Compression ◽  
6061 Aluminum Alloy ◽  
High Speed Impact

Effect of Non-Conventional Aging Treatments on the Tensile Properties of Non-Hipped Castings of Aluminum Alloy 354

2014 ◽  
Vol 875-877 ◽  
pp. 1397-1405 ◽  
Author(s):  
G. Dinesh Babu ◽  
M. Nageswara Rao
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Tensile Properties ◽  
Artificial Aging ◽  
Natural Aging ◽  
Single Step ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Automobile Components

Cast aluminum alloy 354 is used extensively for production of critical automobile components, owing to its excellent castability and attractive combination of mechanical properties after heat-treatment. With the advent of higher performance engines, there has been a steady demand to further improve the mechanical behavior of the castings made of the alloy, among others, through improvements in processing. The present study explores the possibility of improving tensile properties of the alloy by adopting certain non-conventional aging treatments. The non-conventional treatments include aging cycles similar to T6I4 and T6I6 referred to in the published literature, artificial aging in two steps instead of in single step and artificial aging preceded by various natural aging times. The results show that none of these non-conventional treatments leads to improvement of all tensile properties compared to the standard T61 treatment. Significant hardening takes place in the alloy due to natural aging. Changing the time of natural aging preceding artificial aging was found to have little effect on tensile properties.

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.

Natural Aging Behavior of Double-Sided MIG Welded A7N01-T5 Aluminum Alloy

2018 ◽  
Vol 941 ◽  
pp. 1155-1160
Author(s):  
Ying Li ◽  
Zhi Qiang Zhang ◽  
Jian Liu ◽  
Hua Yin ◽  
Chang Shu He
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Aging Process ◽  
Weld Zone ◽  
Natural Aging ◽  
Middle Layer ◽  
Age Hardening ◽  
Aging Behavior ◽  
Epma Analysis ◽  
Zn Content

A heat treatable A7N01 (Al-Zn-Mg) aluminum alloy mainly used to fabricate high-speed train body structures was double-sided welded by MIG welding. The natural aging behavior of the joint was systematically studied by local and global mechanical property testing method. Based on TEM observation and EPMA analysis, the key factors that lead to different natural aging behavior among various regions of the joint were discussed. The global tensile strength of the joints increased obviously after natural aging. All the joint samples fractured in the weld zone, which demonstrated the weld zone was the weakest zone of the joints. And the strength of the global welds were depended on the microstructure and natural aging ability of the weld zone. Moreover, the increase of the tensile property of the three local regions in the weld zone after post natural aging decreased as Middle>lower>upper. The above phenomenon was also further confirmed by microhardness measurement. The age hardening behavior is greatly influenced by the concentration of strengthening precipitates forming element Zn. The Zn content in the weld zone determined by EPMA showed that element Zn was dispersed unevenly, which is attributed to the double V-groove design used in this work and Zn vaporization in the molten pool during welding. The Zn content in the middle layer metals is higher than that of the upper and lower layers, resulting in the remarkable hardening response for the middle layer of the weld zone during natural aging process. Additionally, the solution zone containing the same Zn content as the base metal and undergoing sufficient solid solution during welding was found to possess the high hardening ability after natural aging process.

Effect of Non-Conventional Aging Treatments on the Tensile Properties and Quality Indices of Hipped Components Made of Cast Aluminum Alloy 354

2014 ◽  
Vol 875-877 ◽  
pp. 1429-1436 ◽  
Author(s):  
G. Dinesh Babu ◽  
M. Nageswara Rao
Keyword(s):  
Aluminum Alloy ◽  
Mechanical Behavior ◽  
Tensile Properties ◽  
Artificial Aging ◽  
Natural Aging ◽  
Single Step ◽  
Quality Level ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Quality Indices

Cast aluminum alloy 354 is used extensively for production of critical automobile component, owing to its excellent castability and attractive combination of mechanical properties. With the advent of higher performance engines, there has been a steady demand to further improve the mechanical behavior of the alloy, among others, through improvements in processing. The present study explores the possibility of improving mechanical behavior and quality levels of the alloy by adopting certain non-conventional aging treatments. Quality indices Q and QC have been used for quality rating. The non-conventional treatments include aging cycles similar to T6I4 and T6I6 referred to in the published literature, artificial aging in two steps instead of in single step and artificial aging preceded by various natural aging times. The results show that none of the non-conventional treatments leads to improvement of all tensile properties compared to the standard T61 treatment. However, some specific treatments could be identified which lead to a comparable combination of tensile properties and a shade higher quality level. Increasing the time of preceding natural aging does not help in improving the tensile properties after artificial aging.

High-speed impact compression testing of metals

1980 ◽  
Vol 12 (2) ◽  
pp. 210-213
Author(s):  
G. V. Stepanov ◽  
V. V. Astanin
Keyword(s):  
High Speed ◽  
Compression Testing ◽  
Impact Compression ◽  
High Speed Impact

Effect of Impact Compression on Age Hardening Behavior of Aluminum Alloys

2014 ◽  
Vol 566 ◽  
pp. 409-414 ◽  
Author(s):  
Yuki Kitani ◽  
Keitaro Horikawa ◽  
Hidetoshi Kobayashi ◽  
Kenichi Tanigaki ◽  
Tomo Ogura ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Aging Time ◽  
Point Defects ◽  
Solution Treatment ◽  
Age Hardening ◽  
Impact Compression ◽  
6061 Aluminum Alloy ◽  
Hardening Behavior ◽  
The Impact

The effect of impact compression on age hardening behavior was examined for Meso20 and 6061 aluminum alloys using a single stage gun. The hardness of Meso20 and 6061 aluminum alloy applied with an impact compression (about 5.0GPa) after the solution treatment increased with the aging time. The cluster of point defects like stacking fault tetrahedral (SFT) was observed in the 6061 aluminum alloys with the impact compression (5.3GPa) after the solution treatment. Even after the impact compression, distribution of the aging precipitates was clearly identified.

Studying the Effect of Precipitation Hardening on 6061 Aluminum Alloy Weldments

2016 ◽  
Vol 1133 ◽  
pp. 300-304
Author(s):  
Tahir Ahmad ◽  
Muhammad Kamran ◽  
Muhammad Faizan ◽  
Rafiq Ahmad ◽  
Bamban Ariwahjoedi ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Aluminium Alloys ◽  
Artificial Aging ◽  
Precipitation Hardening ◽  
Solution Treatment ◽  
Maximum Hardness ◽  
6061 Aluminum Alloy ◽  
Specific Strength ◽  
High Specific Strength ◽  
Aging Precipitation

The high specific strength, ease of working, good weldability and the ability to be precipitation strengthening have increased the demand of aluminium alloys in aerospace and automobile industries. In this research the effect of artificial aging/precipitation hardening on mechanical properties and microstructures of 6061 aluminum alloy weldments produced using gas tungsten welding (TIG) was studied. The artificial aging of welded alloy was carried out at temperatures varying from 150°C to 170°C for different period of time. The Vickers hardness and tensile test were carried out to evaluate the response of material to heat treatment. The experimental work showed that the maximum hardness and tensile strength of 6061 aluminum welded samples was achieved when aged at 170°C (after solution treatment) for 2 and 10 hours. Scanning electron microstructure analysis revealed that after solution treatment, when the samples were aged at 150-170°C, the Mg2Si precipitates present in the grains grows in size and develop stress in the grain and resulted increment in hardness.

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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