The influence of minor Sc addition on the low-cycle fatigue (LCF) properties of hot-extruded Al-Zn-Mg-Cu-Zr alloy with T6 state was investigated through performing the LCF tests at room temperature and air environment. The results indicate that two alloys show cyclic stabilisation, cyclic hardening and cyclic softening during fatigue deformation. The addition of Sc can significantly enhance the cyclic stress amplitude of the alloy. Al-Zn-Mg-Cu-Zr-Sc alloy shows higher fatigue lives at lower strain amplitudes, while has lower fatigue lives at higher strain amplitudes. For the two alloys, the density and movability of dislocations are related to the change of cyclic stress amplitudes. The existence of Al3(Sc,Zr) phase can inhibit the appearance of cyclic softening phenomenon in the Al-Zn-Mg-Cu-Zr-Sc alloy.
ZhangXMDengYLZhangY.Development of high strength aluminum alloys and processing techniques for the materials. Acta Metall Sin. 2015; 51(3):257–271.
2.
GuanRGTieD.A review on grain refinement of aluminum alloys: progresses, challenges and prospects. Acta Metall Sin Eng Lett. 2017; 30(5):409–432. doi: 10.1007/s40195-017-0565-8
3.
DaiPLuoXYangYQNano-scale precipitate evolution and mechanical properties of 7085 aluminum alloy during thermal exposure. Mater Sci Eng A. 2018; 729:411–422. doi: 10.1016/j.msea.2018.05.092
4.
WangYLJiangHCLiZMTwo-stage double peaks ageing and its effect on stress corrosion cracking susceptibility of Al-Zn-Mg alloy. J Mater Sci Technol. 2018; 34:1250–1257. doi: 10.1016/j.jmst.2017.05.008
5.
WenKXiongBQZhangYASingle-stage aging behaviour and precipitate evolution in a high Zn-containing Al-9.78Zn-2.02Mg-1.76Cu alloy. Mater Sci Technol. 2018; 34(6):718–724. doi: 10.1080/02670836.2017.1410951
6.
GuoPQianLMengJLow-cycle fatigue behavior of a high manganese austenitic twin-induced plasticity steel. Mater Sci Eng A. 2013; 584:133–142. doi: 10.1016/j.msea.2013.07.020
7.
GazizovMKaibyshevR.Low-cyclic fatigue behaviour of an Al-Cu-Mg-Ag alloy under T6 and T840 conditions. Mater Sci Technol. 2017; 33(6):688–698. doi: 10.1080/02670836.2016.1163876
8.
NandySSekharAPKarTInfluence of ageing on the low cycle fatigue behaviour of an Al-Mg-Si alloy. Philos Mag. 2017; 97:1978–2003. doi: 10.1080/14786435.2017.1322729
9.
DesmukhMNPandeyRKMukhopadhyayAK.Effect of aging treatments on the kinetics of fatigue crack growth in 7010 aluminum alloy. Mater Sci Eng A. 2006; 435-436:318–326. doi: 10.1016/j.msea.2006.07.063
10.
LengLZhangZJDuanQQImproving the fatigue strength of 7075 alloy through aging. Mater Sci Eng A. 2018; 738:24–30. doi: 10.1016/j.msea.2018.09.047
11.
LiYXQiuSFZhuZTIntergranular crack during fatigue in Al-Mg-Si aluminum alloy thin extrusions. Int J Fatigue. 2017; 100:105–112. doi: 10.1016/j.ijfatigue.2017.03.028
12.
KumarNGoelSJayaganthanRThe influence of metallurgical factors on low cycle fatigue behavior of ultrafine grained 6082 Al alloy. Int J Fatigue. 2018; 110:130–143. doi: 10.1016/j.ijfatigue.2018.01.018
13.
WalleyJLLaverniaEJGibelingJC.Low-cycle fatigue of ultra-fine-grained cryomilled 5083 aluminum alloy. Metall Mater Trans A. 2009; 40(11):2622–2630. doi: 10.1007/s11661-009-9971-5
14.
ChrominskiWLewandowskaM.Mechanisms of plastic deformation in ultrafine-grained aluminium - in-situ and ex-post studies. Mater Sci Eng A. 2018; 715:320–331. doi: 10.1016/j.msea.2017.12.083
15.
SreenivasanSMishraSKDuttaK.Ratcheting strain and its effect on low cycle fatigue behavior of Al 7075-T6 alloy. Mater Sci Eng A. 2017; 698:46–53. doi: 10.1016/j.msea.2017.05.048
16.
WangJTZhangYKChenJFEffect of laser shock peening on the high-temperature fatigue performance of 7075 aluminum alloy. Mater Sci Eng A. 2017; 704:459–468. doi: 10.1016/j.msea.2017.08.050
17.
VlachMČížekJSmolaBHeat treatment and age hardening of Al-Si-Mg-Mn commercial alloy with addition of Sc and Zr. Mater Charact. 2017; 129:1–8. doi: 10.1016/j.matchar.2017.04.017
18.
XuCXiaoWLZhengRXThe synergic effects of Sc and Zr on the microstructure and mechanical properties of Al-Si-Mg alloy. Mater Design. 2015; 88:485–492. doi: 10.1016/j.matdes.2015.09.045
19.
LiBPanQLHuangXMicrostructures and properties of Al-Zn-Mg-Mn alloy with trace amounts of Sc and Zr. Mater Sci Eng A. 2014; 616:219–228. doi: 10.1016/j.msea.2014.08.024
20.
GuanRGShenYFZhaoZYA high-strength, ductile Al-0.35Sc-0.2Zr alloy with good electrical conductivity strengthened by coherent nanosized-precipitates. J Mater Sci Technol. 2017; 33:215–223. doi: 10.1016/j.jmst.2017.01.017
21.
PanDZhouSZhangZEffects of Sc(Zr) on the microstructure and mechanical properties of as-cast Al-Mg alloys. Mater Sci Technol. 2017; 33(6):751–757. doi: 10.1080/02670836.2016.1270573
22.
LeeSLWuCTChenYT.Erratum to: effects of minor Sc and Zr on the microstructure and mechanical properties of Al-4.6Cu-0.3Mg-0.6Ag Alloys. J Mater Eng Perform. 2015; 24(5):2170–2170. doi: 10.1007/s11665-015-1452-y
23.
LiBPanQLChenCPEffects of solution treatment on microstructural and mechanical properties of Al-Zn-Mg alloy by microalloying with Sc and Zr. J Alloys Compd. 2016; 664:553–564. doi: 10.1016/j.jallcom.2016.01.016
24.
LiuJYaoPZhaoNQEffect of minor Sc and Zr on recrystallization behavior and mechanical properties of novel Al-Zn-Mg-Cu alloys. J Alloys Compd. 2016; 657:717–725. doi: 10.1016/j.jallcom.2015.10.122
25.
ZhengCKZhangWWZhangDTLow cycle fatigue behavior of T4-treated Al-Zn-Mg-Cu alloys prepared by squeeze casting and gravity die casting. Trans Nonferrous Met Soc China. 2015; 25(11):3505–3514. doi: 10.1016/S1003-6326(15)63992-9
26.
WangYLiuYLiuL.Fatigue behaviors of a Ni-free ZrCuFeAlAg bulk metallic glass in simulated body fluid. J Mater Sci Technol. 2014; 30:622–626. doi: 10.1016/j.jmst.2014.05.002
27.
MahobiaGSPauloseNSreekanthKEffect of saline environment on LCF behavior of Inconel 718 at 550 oC. J Mater Eng Perform. 2015; 24(1):338–344. doi: 10.1007/s11665-014-1278-z
28.
ZhemchuzhnikovaDMironovSKaibyshevR.Fatigue performance of friction-stir-welded Al-Mg-Sc alloy. Metall Mater Trans A. 2017; 48(1):150–158. doi: 10.1007/s11661-016-3843-6
29.
ZhangZHuZFKasprzakWLow-cycle fatigue properties of P92 ferritic-martensitic steel at elevated temperature. J Mater Eng Perform. 2016; 25(4):1650–1662. doi: 10.1007/s11665-016-1977-8
DengYYinZZhaoKEffects of Sc and Zr microalloying additions on the microstructure and mechanical properties of new Al-Zn-Mg alloys. J Alloys Compd. 2012; 530:71–80. doi: 10.1016/j.jallcom.2012.03.108
32.
PešičkaJKuželRDronhoferAThe evolution of dislocation density during heat treatment and creep of tempered martensite ferritic steels. Acta Mater. 2003; 51(16):4847–4862. doi: 10.1016/S1359-6454(03)00324-0
33.
PengXYGuoQLiangXPMechanical properties, corrosion behavior and microstructures of a non-isothermal ageing treated Al-Zn-Mg-Cu alloy. Mater Sci Eng A. 2017; 688:146–154. doi: 10.1016/j.msea.2017.01.086
34.
HutchinsonCRGeuserFChenYQuantitative measurements of dynamic precipitation during fatigue of an Al-Zn-Mg-(Cu) alloy using small-angle X-ray scattering. Acta Mater. 2014; 74:96–109. doi: 10.1016/j.actamat.2014.04.027
35.
ZhuCYHarringtonTLivescuVDetermination of geometrically necessary dislocations in large shear strain localization in aluminium. Acta Mater. 2016; 118:383–394. doi: 10.1016/j.actamat.2016.07.051
