Evolution of microstructure in AZ91 alloy processed by high-pressure torsion
Source abstract
Abstract
An investigation has been conducted on AZ91 magnesium alloy processed in high-pressure torsion (HPT) at 296, 423 and 473 K for different numbers of turns. The microstructure has altered significantly after processing at all processing temperatures. Extensive grain refinement has been observed in the alloy processed at 296 K with apparent grain sizes reduced down to 35 nm. Segmentation of coarse grains by twinning has been observed in the alloy processed at 423 K and 473 K with average apparent grain sizes of 180 nm and 250 nm. Substantial homogeneity in microhardness has been observed in the alloy processed at 296 K compared to that found at 423 K and 473 K. The ultrafine-grained AZ91 alloy exhibited a significant dependence of the yield strength on grain size as shown by the microhardness measurements, and it obeys the expected Hall–Petch relationship. The alloying elements, fraction of nano-sized particles of β-phase, and the dominance of basal slip and pyramidal modes have additional effects on the strengthening of the alloy processed at 296 K.
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Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Aluminum Alloys Composites Properties · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
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1. Ravi Kumar NV, Blandin JJ, Desrayaud C, Montheillet F, Suéry M (2003) Grain refinement in AZ91 magnesium alloy during thermomechanical processing. Mater Sci Eng A 359:150–15710.1016/S0921-5093(03)00334-4 ↗
2. Yamashita A, Horita Z, Langdon TG (2001) Improving the mechanical properties of magnesium and a magnesium alloy through severe plastic deformation. Mater Sci Eng A 300:142–14710.1016/S0921-5093(00)01660-9 ↗
3. Kubota K, Mabuchi M, Higashi K (1999) Processing and mechanical properties of fine-grained magnesium alloys. J Mater Sci 34:2255–2262. doi: 10.1023/A:100456120562710.1023/A:1004561205627 ↗
4. Mabuchi M, Iwasaki H, Yanase K, Higashi K (1997) Low temperature superplasticity in an AZ91 magnesium alloy processed by ECAE. Scr Mater 36:681–68610.1016/S1359-6462(96)00444-7 ↗
5. Figueiredo RB, Langdon TG (2011) Development of structural heterogeneities in a magnesium alloy processed by high-pressure torsion. Mater Sci Eng A 528:4500–450610.1016/j.msea.2011.02.048 ↗
6. Kai M, Horita Z, Langdon TG (2008) Developing grain refinement and superplasticity in a magnesium alloy processed by high-pressure torsion. Mater Sci Eng A 488:117–12410.1016/j.msea.2007.12.046 ↗
7. Xia K, Wang JT, Wu X, Chen G, Gurvan M (2005) Equal channel angular pressing of magnesium alloy AZ31. Mater Sci Eng A 410–411:324–32710.1016/j.msea.2005.08.123 ↗
8. Valiev RZ, Zhilyaev AP, Langdon TG (2013) Bulk nanostructured materials: fundamentals and applications. Wiley, New Jersey10.1002/9781118742679 ↗
9. Gubicza J, Máthis K, Hegedűs Z, Ribárik G, Tóth AL (2010) Inhomogeneous evolution of microstructure in AZ91 Mg-alloy during high temperature equal-channel angular pressing. J Alloy Compd 492:166–17210.1016/j.jallcom.2009.11.150 ↗
10. Zhilyaev AP, Langdon TG (2008) Using high-pressure torsion for metal processing: fundamentals and applications. Prog Mater Sci 53:893–97910.1016/j.pmatsci.2008.03.002 ↗
11. Vander Voort GF (2004) Metals handbook: metallography and microstructures, vol 9. ASM International, Cleveland10.31399/asm.hb.v09.9781627081771 ↗
12. Kawasaki M, Figueiredo RB, Langdon TG (2011) An investigation of hardness homogeneity throughout disks processed by high-pressure torsion. Acta Mater 59:308–31610.1016/j.actamat.2010.09.034 ↗
13. Al-Zubaydi ASJ, Zhilyaev AP, Wang SC, Reed PAS (2015) Superplastic behaviour of AZ91 magnesium alloy processed by high-pressure torsion. Mater Sci Eng A 637:1–1110.1016/j.msea.2015.04.004 ↗
14. Máthis K, Gubicza J, Nam NH (2005) Microstructure and mechanical behavior of AZ91 Mg alloy processed by equal channel angular pressing. J Alloy Compd 394:194–19910.1016/j.jallcom.2004.10.050 ↗
15. Hohenwarter A, Bachmaier A, Gludovatz B, Scheriau S, Pippan R (2009) Technical parameters affecting grain refinement by high pressure torsion. Int J Mater Res 100:1653–166110.3139/146.110224 ↗
16. Myshlyaev MM, McQueen HJ, Mwembela A, Konopleva E (2002) Twinning, dynamic recovery and recrystallization in hot worked Mg–Al–Zn alloy. Mater Sci Eng A 337:121–13310.1016/S0921-5093(02)00007-2 ↗
17. del Valle JA, Pérez-Prado MT, Ruano OA (2003) Texture evolution during large-strain hot rolling of the Mg AZ61 alloy. Mater Sci Eng A 355:68–7810.1016/S0921-5093(03)00043-1 ↗
18. Al-Samman T, Gottstein G (2008) Room temperature formability of a magnesium AZ31 alloy: examining the role of texture on the deformation mechanisms. Mater Sci Eng A 488:406–41410.1016/j.msea.2007.11.056 ↗
19. Zhao YH, Liao XZ, Zhu YT, Horita Z, Langdon TG (2005) Influence of stacking fault energy on nanostructure formation under high pressure torsion. Mater Sci Eng A 410–411:188–19310.1016/j.msea.2005.08.074 ↗
20. Kawasaki M, Figueiredo RB, Huang Y, Langdon TG (2014) Interpretation of hardness evolution in metals processed by high-pressure torsion. J Mater Sci 49:6586–6596. doi: 10.1007/s10853-014-8262-810.1007/s10853-014-8262-8 ↗
21. Stráská J, Janeček M, Gubicza J, Krajňák T, Yoon EY, Kim HS (2015) Evolution of microstructure and hardness in AZ31 alloy processed by high pressure torsion. Mater Sci Eng A 625:98–10610.1016/j.msea.2014.12.005 ↗
22. Harai Y, Kai M, Kaneko K, Horita Z, Langdon TG (2008) Microstructural and mechanical characteristics of AZ61 magnesium alloy processed by high-pressure torsion. Mater Trans 49:76–8310.2320/matertrans.ME200718 ↗
23. Matsubara K, Miyahara Y, Horita Z, Langdon TG (2003) Developing superplasticity in a magnesium alloy through a combination of extrusion and ECAP. Acta Mater 51:3073–308410.1016/S1359-6454(03)00118-6 ↗
24. Braszczyńska-Malik KN, Froyen L (2005) Microstructure of AZ91 alloy deformed by equal channel angular pressing. Int J Mater Res (former: Zeitschrift für Metallkunde) 96:913–917
25. Braszczyńska-Malik KN (2009) Spherical shape of γ-Mg17Al12 precipitates in AZ91 magnesium alloy processed by equal-channel angular pressing. J Alloy Compd 487:263–26810.1016/j.jallcom.2009.07.100 ↗
26. Zhao Z, Chen Q, Hu C, Shu D (2009) Microstructure and mechanical properties of SPD-processed an as-cast AZ91D + Y magnesium alloy by equal channel angular extrusion and multi-axial forging. Mater Des 30:4557–456110.1016/j.matdes.2009.04.023 ↗
27. Cavaliere P, De Marco PP (2007) Superplastic behaviour of friction stir processed AZ91 magnesium alloy produced by high pressure die cast. J Mater Process Technol 184:77–8310.1016/j.jmatprotec.2006.11.005 ↗
28. Pérez-Prado MT, Valle D, Ruano OA (2004) Grain refinement of Mg–Al–Zn alloys via accumulative roll bonding. Scr Mater 51:1093–109710.1016/j.scriptamat.2004.07.028 ↗
29. Kim WJ, Hong SI, Kim YH (2012) Enhancement of the strain hardening ability in ultrafine grained Mg alloys with high strength. Scr Mater 67:689–69210.1016/j.scriptamat.2012.07.002 ↗
30. Figueiredo RB, Pereira PHR, Aguilar MTP, Cetlin PR, Langdon TG (2012) Using finite element modeling to examine the temperature distribution in quasi-constrained high-pressure torsion. Acta Mater 60:3190–319810.1016/j.actamat.2012.02.027 ↗
31. Edalati K, Miresmaeili R, Horita Z, Kanayama H, Pippan R (2011) Significance of temperature increase in processing by high-pressure torsion. Mater Sci Eng A 528:7301–730510.1016/j.msea.2011.06.031 ↗
32. Al-Zubaydi A, Figueiredo RB, Huang Y, Langdon TG (2013) Structural and hardness inhomogeneities in Mg-Al-Zn alloys processed by high-pressure torsion. J Mater Sci 48:4661–4670. doi: 10.1007/s10853-013-7176-110.1007/s10853-013-7176-1 ↗
33. Zhilyaev AP, Nurislamova GV, Kim B-K, Baró MD, Szpunar JA, Langdon TG (2003) Experimental parameters influencing grain refinement and microstructural evolution during high-pressure torsion. Acta Mater 51:753–76510.1016/S1359-6454(02)00466-4 ↗
34. Zhilyaev AP, Oh-ishi K, Langdon TG, McNelley TR (2005) Microstructural evolution in commercial purity aluminum during high-pressure torsion. Mater Sci Eng A 410–411:277–28010.1016/j.msea.2005.08.044 ↗
35. Zhilyaev AP, Lee S, Nurislamova GV, Valiev RZ, Langdon TG (2001) Microhardness and microstructural evolution in pure nickel during high-pressure torsion. Scr Mater 44:2753–275810.1016/S1359-6462(01)00955-1 ↗
36. Vorhauer A, Pippan R (2004) On the homogeneity of deformation by high pressure torsion. Scr Mater 51:921–92510.1016/j.scriptamat.2004.04.025 ↗
37. Huang Y, Kawasaki M, Langdon TG (2013) Influence of anvil alignment on shearing patterns in high-pressure torsion. Adv Eng Mater 15:1–75510.1002/adem.201200363 ↗
38. Somekawa H, Hirai K, Watanabe H, Takigawa Y, Higashi K (2005) Dislocation creep behavior in Mg–Al–Zn alloys. Mater Sci Eng A 407:53–6110.1016/j.msea.2005.06.059 ↗
39. Tahreen N, Chen DL, Nouri M, Li DY (2014) Effects of aluminum content and strain rate on strain hardening behavior of cast magnesium alloys during compression. Mater Sci Eng A 594:235–24510.1016/j.msea.2013.11.078 ↗
40. Figueiredo RB, Aguilar MTP, Cetlin PR, Langdon TG (2012) Analysis of plastic flow during high-pressure torsion. J Mater Sci 47:7807–7814. doi: 10.1007/s10853-012-6506-z10.1007/s10853-012-6506-z ↗
41. Kawasaki M, Figueiredo RB, Langdon TG (2012) Twenty-five years of severe plastic deformation: recent developments in evaluating the degree of homogeneity through the thickness of disks processed by high-pressure torsion. J Mater Sci 47:7719–7725. doi: 10.1007/s10853-012-6507-y10.1007/s10853-012-6507-y ↗
42. Furukawa M, Horita Z, Nemoto M, Valiev RZ, Langdon TG (1996) Microhardness measurements and the Hall-Petch relationship in an Al-Mg alloy with submicrometer grain size. Acta Mater 44:4619–462910.1016/1359-6454(96)00105-X ↗
43. Xu J, Shirooyeh M, Wongsa-Ngam J, Shan D, Guo B, Langdon TG (2013) Hardness homogeneity and micro-tensile behavior in a magnesium AZ31 alloy processed by equal-channel angular pressing. Mater Sci Eng A 586:108–11410.1016/j.msea.2013.07.096 ↗
44. Chang S-Y, Lee S-W, Kang KM, Kamado S, Kojima Y (2004) Improvement of mechanical characteristics in severely plastic-deformed Mg alloys. Mater Trans 45:488–49210.2320/matertrans.45.488 ↗
45. Setman D, Schafler E, Korznikova E, Zehetbauer MJ (2008) The presence and nature of vacancy type defects in nanometals detained by severe plastic deformation. Mater Sci Eng A 493:116–12210.1016/j.msea.2007.06.093 ↗
46. Gubicza J, Dobatkin SV, Khosravi E, Kuznetsov AA, Lábár JL (2011) Microstructural stability of Cu processed by different routes of severe plastic deformation. Mater Sci Eng A 528:1828–183210.1016/j.msea.2010.11.026 ↗