scholarly journals Review On Progress of 7xxx Series Aluminum Alloy Materials

2021 ◽  
Author(s):  
Yuxin Dai ◽  
Liangming Yan ◽  
Jianpeng Hao
Keyword(s):  
Heat Treatment ◽  
Trace Elements ◽  
Aluminum Alloy ◽  
First Generation ◽  
High Strength ◽  
Preparation Methods ◽  
Fifth Generation ◽  
Aging Precipitation ◽  
Series Aluminum Alloy ◽  
Series Alloy

Since the first generation of 7xxx superhard aluminum alloy was investigated in 1930, hitherto the fifth generation aluminum alloy materials with high comprehensive properties such as high static strength, high strength, heat resistance, high toughness, damage resistance, low density and low quenching sensitivity have been improved and developed. This paper reviews the progress of 7xxx aluminum alloy materials in composition, microstructure, properties, preparation methods, heat treatment strengthening and applications from 2014 to 2021. The effect of adding trace elements on microstructure and properties of 7xxx series alloy and the problems existing in aging precipitation characteristics and reinforcement mechanism are discussed. The future development direction of 7xxx superhard aluminum alloy is prospected by optimizing heat treatment technological, adding appropriate trace elements to alloy and controlling alloy microstructure.

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.

On the suppression of Lüders elongation in high-strength Cu/Zn modified 5xxx series aluminum alloy

2020 ◽  
Vol 834 ◽  
pp. 155138
Author(s):  
Yingxin Geng ◽  
Di Zhang ◽  
Jishan Zhang ◽  
Linzhong Zhuang
Keyword(s):  
Aluminum Alloy ◽  
High Strength ◽  
Series Aluminum Alloy

Heat treatment of high-strength granulated aluminum alloy

1979 ◽  
Vol 21 (9) ◽  
pp. 709-711
Author(s):  
V. M. Fedorov ◽  
V. I. Elagin ◽  
R. M. Sizova ◽  
A. S. Sokolov
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
High Strength

Research Progress on Heat Treatment Processes of 7000 Series Aluminum Alloy

2014 ◽  
Vol 884-885 ◽  
pp. 316-319 ◽  
Author(s):  
Li Ping Zhong ◽  
Li Zhao ◽  
Long Zhou
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
Research And Development ◽  
Aging Process ◽  
Research Progress ◽  
Aging Heat Treatment ◽  
Microstructure And Properties ◽  
Treatment Processes ◽  
The Future ◽  
Series Aluminum Alloy

The research progress of homogenization, solution and aging heat treatment processes and their effects on microstructure and properties of 7000 series aluminum alloy was reviewed in this paper. The solution and aging process were analysed mainly. The problems existing in the industrialization application of heat treatment of the alloy and the demanding problems to be solved in research and development in the future were described.

Investigation of the joinability of the high-strength aluminum alloy AA7075 in shear-clinching processes

2021 ◽  
pp. 146442072110679
Author(s):  
S Wiesenmayer ◽  
M Merklein
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
High Strength ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
High Strength Aluminum Alloy ◽  
Heat Treated ◽  
Strength Alloy ◽  
Heating Up

Shear-clinching has proven to be a suitable technology for joining of high-strength materials. However, the mechanical properties of the upper joining partner are limited due to the high strains, which occur during the process. Therefore, shear-clinching of the high-strength aluminum alloy AA7075 in the T6 temper is not possible. Yet, the mechanical properties of hardenable alloys of the 7000 series can be influenced by a heat treatment. Thus, within the scope of this work, the joinability of the high-strength alloy AA7075 in shear-clinching processes in dependance of its temper is investigated. The as fabricated state F, the artificially aged T6 temper, a paint baked state and the naturally aged T4 temper are compared to the fully solution annealed W temper as well as to a retrogression heat-treated state. For retrogression heat treatment, a laser is used as heat source, heating up the alloy for a short term in order to only partially dissolve precipitations. The resulting mechanical properties are determined with uniaxial tensile tests. Moreover, the influence of the mechanical properties of AA7075 on the shear-clinching process, the joint formation and the resulting joint strength is analyzed.

Age Hardening Behavior in Al-8Zn-2Mg-2Cu Wrought Aluminum Alloy

2012 ◽  
Vol 710 ◽  
pp. 527-532
Author(s):  
V. Anil Kumar ◽  
Raghavendra R. Bhat ◽  
Romesh C. Sharma
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
Aging Time ◽  
Large Scale ◽  
Aluminum Matrix ◽  
High Strength ◽  
Age Hardening ◽  
Stable Phase ◽  
Conductivity Measurements ◽  
Peak Aging

Aluminum alloys based on Al-Zn-Mg-Cu system classified under high strength light alloys, find a large scale application in aerospace sector. In the present study, heat treatment of an Aluminum alloy with Al-8Zn-2Mg-2Cu wt.% (AA7449) was carried out. Heat treatment parameters were optimized based on hardness and conductivity measurements. The mechanisms of strengthening in primary and secondary aged states are explained using hardness and conductivity measurements. Conductivity generally showed an increasing trend with increase in aging time, which could be attributed to decrease in the lattice distortion of the Aluminum matrix with increase in aging time. The dissolution of GP zones and formation of other metastable phases like η’ and stable phase like η were found to reduce the supersaturation in the matrix as the precipitation growth and coarsening processes are completed during overaging. Transmission electron microscopy (TEM) study was carried out to confirm the peak-aging regime. Selected Area Diffraction (SAD) patterns were recorded where GP zones and η’ precipitates were observed in the bright field images to establish their nature. The mechanical properties were correlated with the TEM observations and was suggested that a critical distribution of GP zones and η’ precipitates is essential to achieve peak strength in Al-Zn-Mg alloys.

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