scholarly journals Effects of Zn addition on age hardening of A6063 aluminum alloy in T5 treatment

2021 ◽  
Vol 71 (8) ◽  
pp. 349-352
Author(s):  
Yasutaka Kuroda ◽  
Masahiro Araki ◽  
Tsutomu Mori ◽  
Kenji Matsuda
Keyword(s):  
Aluminum Alloy ◽  
Age Hardening ◽  
Zn Addition

Effects of Zn addition on the age hardening behavior and precipitation evolution of an Al-Mg-Si-Cu alloy

2018 ◽  
Vol 145 ◽  
pp. 258-267 ◽  
Author(s):  
Shang Zhu ◽  
Zhihui Li ◽  
Lizhen Yan ◽  
Xiwu Li ◽  
Shuhui Huang ◽  
...  
Keyword(s):  
Age Hardening ◽  
Hardening Behavior ◽  
Cu Alloy ◽  
Zn Addition

scholarly journals Age hardening behaviors of spun 2219 aluminum alloy component

2020 ◽  
Vol 9 (3) ◽  
pp. 4706-4716
Author(s):  
Z.X. Li ◽  
M. Zhan ◽  
X.G. Fan ◽  
X.X. Wang ◽  
F. Ma
Keyword(s):  
Aluminum Alloy ◽  
Age Hardening ◽  
Alloy Component ◽  
2219 Aluminum Alloy

Age Hardening Behavior in a Commercial 319-Type Aluminum Alloy

2013 ◽  
pp. 247-262 ◽  
Author(s):  
R. Jahn ◽  
W. T. Donlon ◽  
J. E. Allison
Keyword(s):  
Aluminum Alloy ◽  
Age Hardening ◽  
Hardening Behavior

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.

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.

scholarly journals The Effect Of Two-Stage Age Hardening Treatment Combined With Shot Peening On Stress Distribution In The Surface Layer Of 7075 Aluminum Alloy

2015 ◽  
Vol 60 (3) ◽  
pp. 1993-1998 ◽  
Author(s):  
Ł. Kaczmarek ◽  
P. Zawadzki ◽  
M. Stegliński ◽  
R. Wójcik ◽  
M. Klich ◽  
...  
Keyword(s):  
Surface Layer ◽  
Aluminum Alloy ◽  
Stress Distribution ◽  
Shot Peening ◽  
Age Hardening ◽  
7075 Aluminum Alloy ◽  
Two Stage ◽  
Compressive Stresses ◽  
Hardening Treatment ◽  
Thermo Mechanical Treatment

Abstract The article present the results of the study on the improvement of mechanical properties of the surface layer of 7075 aluminum alloy via two-stage aging combined with shot peening. The experiments proved that thermo-mechanical treatment may significantly improve hardness and stress distribution in the surface layer. Compressive stresses of 226 MPa±5.5 MPa and hardness of 210±2 HV were obtained for selected samples.

Sign in / Sign up

Export Citation Format

Share Document