Correlation of grain boundary precipitate characteristics with fracture and fracture toughness in an Mg-8Al-0.5 Zn alloy
Source abstract
Abstract
Abstract In the present work, the fracture and fracture toughness properties of the Mg-0.8Al-0.5Zn alloy have been studied. In view of this, four different aging temperatures were selected to vary the size and area fraction of grain boundary precipitates and the associated precipitate-free zones (PFZs) width. The results suggest that the precipitation state at the grain boundary plays an important role in deciding the exact mode of failure (i.e., intergranular or transgranular type). The role of precipitate characteristics in determining the fracture mode has been ascertained. Moreover, the significance of preferential deformation within PFZ regions has been evaluated using TEM. The correlation between the various microstructural features and fracture toughness value is established following the Hornbogen and Graf model. The measured values of fracture toughness are found to be in good agreement with the values predicted by the model.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Aluminum Alloys Composites Properties · Aluminum Alloy Microstructure Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Recent development in light alloys10.2320/matertrans1989.37.12 ↗
2. Ductile fracture in the interior of precipitate free zone in an A1-6% Zn-2.6% Mg Alloy10.1016/0001-6160(76)90048-1 ↗
3. The aging characteristics of aluminium alloys – electron microscope studies of alloys based on the aluminium-zinc-magnesium system
4. On the tensile fracture of aluminium alloy
5. The microstructure and mechanical properties of Al-6%Zn-3%Mg
6. Precipitation and hardening in magnesium alloys10.1007/s11661-012-1217-2 ↗
7. TEM study of continuous precipitation in Mg-9wt%Al-1wt%Zn Alloy10.1016/S1359-6454(00)00004-5 ↗
8. Influence of the precipitate free zone width on the tensile properties of an Al-6wt% Zn-1.2wt% Mg Alloy10.1007/BF02668000 ↗
9. Grain boundary ductile fracture in precipitation hardened aluminium alloys10.1016/0001-6160(87)90001-0 ↗
10. A model for predicting fracture mode and toughness in 7000 series Al alloys10.1016/j.actamat.2004.01.044 ↗
11. The fracture behavior of recrystallized Al-2.8% Li-0.3% Mn sheet10.1016/0025-5416(80)90110-X ↗
12. Precipitation and its effect on the mechanical properties of a cast Mg-Gd-Nd-Zr alloy10.1016/j.msea.2007.11.080 ↗
13. Effect of aging treatment on fracture toughness in ZM61 magnesium alloy10.1179/1743284714Y.0000000633 ↗
14. Fracture toughness of precipitation hardened alloys containing narrow soft zones at grain boundaries10.1016/0001-6160(77)90173-0 ↗
15. Aging behaviour and precipitate morphologies in Mg–7.7Al–0.5Zn–0.3Mn (wt%) alloy10.1016/j.jallcom.2008.08.043 ↗
16. ASTM E8/E8M-04 · 2015
17. Dieter · 2007
18. ASTM E399-12ε3 · 2013
19. Discontinuous and continuous precipitation in magnesium–aluminium type alloys10.1016/j.jallcom.2008.11.008 ↗
20. Metallographic investigation of precipitation of silicon from aluminium10.1016/0001-6160(59)90143-9 ↗
21. The nucleation of precipitates: the system Al-Zn-Mg10.1016/0001-6160(65)90067-2 ↗
22. Grain boundary precipitate free zones in Al-Li alloys10.1016/0001-6160(87)90253-7 ↗
23. The presence and consequences of precipitate free zone in an aluminium-copper-lithium alloy10.1007/BF00576770 ↗
24. Experimental and computational investigation of formation of precipitate free zones in an Al-Cu alloy10.2320/matertrans.46.1230 ↗
25. Effect of pre-strain and grain size on the evolution of precipitate free zones (PFZs) in a Mg-8Al-0.5Zn alloy10.1016/j.matlet.2017.05.026 ↗
26. Effect of ageing treatment on the precipitation behaviour of Mg-Gd-Y-Zn-Zr Alloy10.1016/j.jallcom.2012.09.101 ↗
27. The relationship between ductility and grain-boundary precipitates in an Al-6.0% Zn-2.6% Mg Alloy10.1007/BF00542307 ↗
28. The tensile deformation and fracture behaviour of a magnesium alloy10.1016/j.jallcom.2007.07.061 ↗
29. Microstructure, tensile properties and fracture behaviour of an Al-Cu-Li-Mg-Zr alloy 809010.1007/BF01105669 ↗
30. Effects of heat treatment on grain-boundary β-Mg17Al12 and fracture properties of resistance spot-welded AZ80 Mg alloy10.1007/s11661-013-1724-9 ↗
31. Microstructure and tensile properties of thixomolded magnesium alloys10.1016/j.jallcom.2010.02.042 ↗
32. Fracture behavior of AZ91 magnesium alloy10.1016/S0167-577X(00)00041-0 ↗
33. The effect of slip distribution on the monotonic and cyclic ductility of Al-Li binary alloys10.1016/0001-6160(82)90199-7 ↗
34. Deformation within precipitate-free zones in an aged Al-Zn-Mg alloy
35. Observation of ductile intercrystalline fracture of an Al-Zn-Mg-Alloy10.1016/0001-6160(77)90174-2 ↗
36. Effect of precipitation aging on the fracture behavior of Mg–11Gd–Nd –0.4Zr cast alloy10.1016/j.matchar.2007.07.002 ↗
37. Metallurgical factors affecting fracture toughness of aluminum alloys
38. Effects of solidification rate and ageing on the microstructure and mechanical properties of AZ91 alloy10.1016/S0921-5093(01)01467-8 ↗