To address the existing defects in the processing of magnesium alloy seamless tubes (MASTs), a new technology for producing AZ31 alloy tubes using a rotary piercing process was studied. Through the finite-element method and experimental analyses, the distributions of stress and strain and the temperature fields were analysed. The effects of temperature, radial reduction, plug diameter, and advance on the penetration rate, diameter, and wall thickness of the tube were studied. The results showed that temperature is the most important parameter; the penetration rate of the tube was >90% for rolling temperatures of 350–450°C. There was complete dynamic recrystallisation and a uniform distribution of equiaxed grains. This process can potentially replace the traditional extrusion process to produce MASTs.
KulekciMK.Magnesium and its alloys applications in automotive industry. Int J Adv Manuf Technol. 2008;39:851–865. doi: 10.1007/s00170-007-1279-2
2.
CaoZ, WangF, WanQ, Microstructure and mechanical properties of AZ80 magnesium alloy tube fabricated by hot flow forming. Mater Des. 2015;67:64–71. doi: 10.1016/j.matdes.2014.11.016
3.
BiswasS, SuwasS, SikandR, Analysis of texture evolution in pure magnesium and the magnesium alloy AM30 during rod and tube extrusion. Mater Sci Eng A. 2011;528:3722–3729. doi: 10.1016/j.msea.2011.01.021
4.
LiuY, WuX.A microstructure study on an AZ31 magnesium alloy tube after Hot metal Gas forming process. J Mater Eng Perform. 2007;16:354–359. doi: 10.1007/s11665-007-9062-y
5.
HeZ, YuanS, LiuG, Formability testing of AZ31B magnesium alloy tube at elevated temperature. J Mater Process Technol. 2010;210:877–884. doi: 10.1016/j.jmatprotec.2010.01.020
6.
YuanR, WuZ, CaiH, Effects of extrusion parameters on tensile properties of magnesium alloy tubes fabricated via hydrostatic extrusion integrated with circular ECAP. Mater Des. 2016;101:131–136. doi: 10.1016/j.matdes.2016.03.141
7.
LuoAA, SachdevAK.Mechanical properties and microstructure of AZ31 magnesium alloy tubes. Essent Read Magnesium Technol. 2004;61:381–387.
8.
WuW, ZhangP, ZengX, Bendability of the wrought magnesium alloy AM30 tubes using a rotary draw bender. Mater Sci Eng. 2008;486:596–601. doi: 10.1016/j.msea.2007.09.033
9.
HanadaK, MatsuzakiK, HuangX, Fabrication of Mg alloy tubes for biodegradable stent application. Mater Sci Eng C. 2013;33:4746–4750. doi: 10.1016/j.msec.2013.07.033
10.
FangG, AiW-J, LeeflangS, Multipass cold drawing of magnesium alloy minitubes for biodegradable vascular stents. Mater Sci Eng C. 2013;33:3481–3488. doi: 10.1016/j.msec.2013.04.039
11.
HsiangSH, LinYW.Investigation of the influence of process parameters on hot extrusion of magnesium alloy tubes. J Mater Process Technol. 2007;192–193:292–299. doi: 10.1016/j.jmatprotec.2007.04.063
12.
HwangY-M, ChangC-N.Hot extrusion of hollow helical tubes of magnesium alloys. Procedia Eng. 2014;81:2249–2254. doi: 10.1016/j.proeng.2014.10.316
13.
FurushimaT, ManabeK.Experimental and numerical study on deformation behavior in dieless drawing process of superplastic microtubes. J Mater Process Technol. 2007;191:59–63. doi: 10.1016/j.jmatprotec.2007.03.084
14.
FarajiG, BabaeiA, MashhadiMM, Parallel tubular channel angular pressing (PTCAP) as a new severe plastic deformation method for cylindrical tubes. Mater Lett. 2012;77:82–85. doi: 10.1016/j.matlet.2012.03.007
15.
WangL, FangG, QianL, Forming of magnesium alloy microtubes in the fabrication of biodegradable stents. Mater Int. 2014;24(5):500–506.
16.
UlaciaI, DudamellNV, GálvezF, Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates. Acta Mater. 2010;58:2988–2998. doi: 10.1016/j.actamat.2010.01.029
17.
GuoL, FujitaF.Influence of rolling parameters on dynamically recrystallized microstructures in AZ31 magnesium alloy sheets. J Magnesium Alloys. 2015;3:95–105. doi: 10.1016/j.jma.2015.04.004
18.
GuoF, ZhangD, FanX, Deformation behavior of AZ31 Mg alloys sheet during large strain hot rolling process: A study on microstructure and texture evolutions of an intermediate-rolled sheet. J Alloys Compd. 2016;663:140–147. doi: 10.1016/j.jallcom.2015.12.063
19.
DudamellNV, UlaciaI, GálvezF, Twinning and grain subdivision during dynamic deformation of a Mg AZ31 sheet alloy at room temperature. Acta Mater. 2011;59:6949–6962. doi: 10.1016/j.actamat.2011.07.047
20.
ChinoY, KimuraK, MabuchiM.Deformation characteristics at room temperature under biaxial tensile stress in textured AZ31 Mg alloy sheets. Acta Mater. 2009;57:1476–1485. doi: 10.1016/j.actamat.2008.11.033
21.
HuangZ, HuangQ, WeiJ, Inhibitory effects of prefabricated crown on edge crack of rolled AZ31 magnesium alloy plate. J Mater Process Technol. 2017;246:85–92. doi: 10.1016/j.jmatprotec.2017.01.034
22.
KabirianF, KhanAS, Gnaupel-HerlodT.Plastic deformation behavior of a thermo-mechanically processed AZ31 magnesium alloy under a wide range of temperature and strain rate. J Alloys Compd. 2016;673:327–335. doi: 10.1016/j.jallcom.2016.02.145
23.
WangF, ShuangY, HuJ, Explorative study of tandem skew rolling process for producing seamless steel tubes. J Mater Process Technol. 2014;214:1597–1604. doi: 10.1016/j.jmatprotec.2014.03.002
24.
LiuG, ZhouJ, DuszczykJ.FE analysis of metal flow and weld seam formation in a porthole die during the extrusion of a magnesium alloy into a square tube and the effect of ram speed on weld strength. J Mater Process Technol. 2008;200:185–198. doi: 10.1016/j.jmatprotec.2007.09.032
25.
YoshiharaS, MacDonaldB, HasegawaT, Design improvement of spin forming of magnesium alloy tubes using finite element. J Mater Process Technol. 2004;153–154:816–820. doi: 10.1016/j.jmatprotec.2004.04.386
26.
KoppR, WiegelsH.Einführung in die Umformtechnik. Aachen: Verlag Mainz, 1999.
