Thermal deformation plays a key role in improving the comprehensive performance of 7085 aluminium alloy. We simulated the thermal deformation with a Gleeble-3800 thermal simulator under various deformation passes. The results showed that the softening mechanism in every deformation pass is principally recovery, and recrystallisation is relatively low. The sample compression by the single pass deformation at 673 K has the maximum recrystallisation fraction of 27.4%. The recrystallisation fraction of the sample compressed by three passes at 673 K and holding time of 120s reaches 23.2% due to the activation of meta-dynamic recrystallisation. Meanwhile, static recovery is more sufficient and more regular sub-grains (73.8%) are observed. Additionally, multi-pass deformation process is adopted to decrease the texture intensity and grain anisotropy.
Ram PrabhuT.An overview of high-performance aircraft structural Al alloy-AA7085[J]. Acta Metall Sinica. 2015;28(7):909–921.
2.
BharathKMandalAKarmakarAUnderstanding the effect of hot extrusion on the evolution of microstructure and associated mechanical properties in sintered Al-Cu-Mg alloys[J]. Mater Charact. 2020;170(1):110715.
3.
JiangJJiangFHuangHHot deformation analysis and microstructure evolution of Al–Mg–Mn-Sc-Zr alloy by isothermal compression[J]. J Alloys Compd. 2021;858(1):157655.
4.
ZhangJYiYHuangSDynamic recrystallization mechanisms of 2195 aluminum alloy during medium/high temperature compression deformation[J]. Mater Sci Eng A. 2021;804(1):140650.
5.
McqueenHJ.Development of dynamic recrystallization theory[J]. Mater Sci Eng A. 2004;387-389(1):203–208.
6.
LiDZhangDLiuSDynamic recrystallization behavior of 7085 aluminum alloy during hot deformation[J]. Trans Nonferr Metal Soc China. 2016;26(6):1491–1497.
7.
LinYCWuXYChenXMEBSD study of a hot deformed nickel-based superalloy[J]. J Alloys Compd. 2015;640:101–113.
8.
ShiCLaiJ-Grant ChenX.Microstructural evolution and dynamic softening mechanisms of Al-Zn-Mg-Cu alloy during hot compressive deformation[J]. Materials (Basel). 2013;7(1):244–264.
9.
LinYLiuWWangLUltra-fine grained structure in Al-Mg induced by discontinuous dynamic recrystallization under moderate straining[J]. Mater Sci Eng A. 2013;573:197–204.
10.
SakaiTBelyakovAKaibyshevR.Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions[J]. Prog Mater Sci. 2014;60(1):130–207.
11.
SakaiTMiuraHGoloborodkoA.Continuous dynamic recrystallization during the transient severe deformation of aluminum alloy 7475[J]. Acta Mater. 2009;57(1):153–162.
12.
ZhaoMHuangLZengR.In-situ observations and modeling of metadynamic recrystallization in 300M steel[J]. Mater Charact. 2019;159:109997.
13.
ShenWZhangCZhangLMetadynamic recrystallization of Nb–V microalloyed steel during hot deformation[J]. J Mater Res. 2017;32(3):656–665.
14.
LiLZhengLYeBMetadynamic and static recrystallization softening behavior of a bainite steel. Met Mater Int. 2018;24(1):60–66.
15.
RoucoulesCHodgsonPDYueSSoftening and microstructural change following the dynamic recrystallization of austenite[J]. Metallurgical & Materials Transactions A. 1994;25(2):389–400.
16.
XuZSakaiT.Kinetics of recovery and recrystallization in dynamically recrystallized austenite[J]. Mater Trans Jim. 1991;32(2):174–180.
17.
CaoYDiHS.Grain boundary character distribution during the post-deformation recrystallization of Incoloy 800H at elevated temperature[J]. Mater Lett. 2016;163:24–27.
18.
ChenXMLinYCWenDXDynamic recrystallization behavior of a typical nickel-based superalloy during hot deformation [J]. Mater Des. 2014;57(5):568–577.
19.
WangZJMaMQiuZXMicrostructure, texture and mechanical properties of AA 1060 aluminum alloy processed by cryogenic accumulative roll bonding[J]. Mater Charact. 2018;139:269–278.
20.
WangXFGuoMXCaoLYEffect of heating rate on mechanical property, microstructure and texture evolution of Al-Mg-Si-Cu alloy during solution treatment[J]. Mater Sci Eng A. 2015;621:8–17.
21.
DohertyRD.Recrystallization and texture[J]. Prog Mater Sci. 1997;42(1-4):39–58.
22.
LiuWCMorrisJG.Effect of hot and cold deformation on the P 011<455 > recrystallization texture in a continuous cast Al-Mn-Mg aluminum alloy[J]. Scr Mater. 2006;54(12):2095–2099.
23.
LiHZLeiYAYanWBThermal deformation and dynamic recrystallization of a novel HEXed P/M nickel-based superalloy[J]. Mater Charact. 2020;163:110285.
24.
ChenXMLinYCWenDXDynamic recrystallization behavior of a typical nickel-based superalloy during hot deformation-sciencedirect. Mater Des. 2014;57(5):568–577.
25.
MazièreMDierkeH.Investigations on the Portevin-Le Chatelier critical strain in an aluminum alloy. Comput Mater Sci. 2012;52:68–72.
26.
QinFZhuHWangZDislocation and twinning mechanisms for dynamic recrystallization of as-cast Mn18Cr18N steel[J]. Mater Sci Eng A. 2016;684:634–644.
27.
ZhaoXZhangQYangXFlow behavior and microstructure characterization of 7085 aluminum alloy under various deformation conditions[J]. Metall Mater Trans A. 2021;52(11):4865–4876.
28.
YangQMLinYCChenMSModeling dynamic recrystallization behavior in a novel HIPed P/M superalloy during high-temperature deformation[J]. Materials (Basel). 2022;15(11):4030.
