This study investigated the effects of aging heat treatment on the change of thermal properties of 7075 Al alloy using differential scanning calorimetry and a laser flash apparatus. The thermal diffusivity showed different trends in the three temperature ranges: In the range from room temperature to 160°C, the thermal diffusivity increased with increasing temperature. Between 160 and 240°C, the thermal diffusivity increased with an increase in the temperature of the specimen. Precipitation was completed at 240°C or higher, and the thermal diffusivity decreased with an increase in the temperature of the specimen. The amount of precipitation of η′ and η phases did not affect the change in thermal diffusivity but only contributed to the improvement of micro-hardness.
KheradmandABTayebiMAkbariMMEffect of quench-controlled precipitation hardening on microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr alloys contain of Sc micro-alloying. J Alloys Compd. 2022;902:163748.
2.
JataKVSankaranKKRuschauJJ.Friction-stir welding effects on microstructure and fatigue of aluminum alloy 7050-T7451. Metall Mater Trans A. 2000;31:2181–2192.
3.
ZhangFSuXChenZEffect of welding parameters on microstructure and mechanical properties of friction stir welded joints of a super high strength Al–Zn–Mg–Cu aluminum alloy. Mater Des. 2015;67:483–491.
4.
ChenGChenQWangBMicrostructure evolution and tensile mechanical properties of thixoformed high performance Al-Zn-Mg-Cu alloy. Met Mater Int. 2015;21:897–906.
5.
ChoiS-WKimY-MKimY-CEffects of alloying elements on mechanical and thermal characteristics of Al-6wt-%Si-0.4wt-%Mg–(Cu) foundry alloys. Mater Sci Technol. 2019;35:1365–1371.
6.
ZhaoJLiuZBaiSEffects of natural aging on the formation and strengthening effect of G.P. zones in a retrogression and re-aged Al–Zn–Mg–Cu alloy. J Alloys Compd. 2020;829:154469.
7.
ZouXYanHChenX.Evolution of second phases and mechanical properties of 7075 Al alloy processed by solution heat treatment. Trans Nonferrous Met Soc China. 2017;27:2146–2155.
8.
LiBWangXChenHInfluence of heat treatment on the strength and fracture toughness of 7N01 aluminum alloy. J Alloys Compd. 2016;678:160–166.
9.
LiangZMWangGYSunZRapidly improved tensile strength of 6N01 Al alloy FSW joints by electropulsing and artificial aging treatment. Mater Sci Eng A. 2022;841:143056.
10.
WuZWuSBaoJThe effect of defect population on the anisotropic fatigue resistance of AlSi10Mg alloy fabricated by laser powder bed fusion. Int J Fatigue. 2021;151:106317.
11.
SunYWangXLiuBInverse solution to heat transfer coefficient during heat assembly of aluminum alloy drill pipes. Adv Mech Eng. 2017;9:1–12.
12.
PankadeSBKhedekarDSGogteCL.The influence of heat treatments on electrical conductivity and corrosion performance of AA 7075-T6 aluminium alloy. Proc Manuf. 2018;20:53–58.
13.
ChoiSKimY-MKimY-C.Influence of precipitation on thermal diffusivity of Al-6Si-0.4Mg-0.9Cu-(Ti) alloys. J Alloys Compd. 2019;775:132–137.
14.
LloydDJChaturvediMC.A calorimetric study of aluminium alloy AA-7075. J Mater Sci. 1982;17:1819–1824.
15.
HatchJE.Aluminum: properties and physical metallurgy. ASM, Ohio, US. Ohio: Aluminum Properties and Physical Metallurgy, American Society for Metals; 2005.
16.
LacomW.Calorimetric investigations in a dispersion strengthened 7075 alloy. Thermochim Acta. 1996;271:93–100.
17.
PanigrahiSKJayaganthanR.Effect of annealing on thermal stability, precipitate evolution, and mechanical properties of cryorolled Al 7075 alloy. Metall Mater Trans A. 2011;42:3208–3217.
18.
MilkereitBÖsterreichMSchusterPDissolution and precipitation behavior for hot forming of 7021 and 7075 aluminum alloys. Metals (Basel). 2018;8:1–14.
19.
BiswasASiegelDJSeidmanDN.Sciencedirect compositional evolution of Q-phase precipitates in an aluminum alloy. ACTA Mater. 2014;75:322–336.
