Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression

Chen, Y.J.; Wang, Q.D.; Roven, Hans Jørgen; Karlsen, Morten; Yu, Yingda; Liu, M.P.; Hjelen, J.

doi:10.1016/j.jallcom.2007.07.116

Cited by 87 publications

(32 citation statements)

References 26 publications

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“…Moreover, it is very suitable for refining grains of hard-to-deform metals such as magnesium alloys since it imposes three-dimensional compression stresses during processing [8,13]. In the past, CEC was successfully used to produce a variety of metallic materials with ultra-fine grain structures in alloys AZ31and ZK60 [8,10,[13][14][15]. However, it is difficult to produce simultaneous increase in strength and ductility compared with the as-extruded alloy.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and enhanced mechanical properties of an Mg–10Gd–2Y–0.5Zr alloy processed by cyclic extrusion and compression

Tao

Wang

Lin

et al. 2011

Materials Science and Engineering: A

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The evolution of microstructure and texture of an extruded GW102K Mg alloy processed by cyclic extrusion and compression (CEC) at 450 °C were investigated. Tensile tests were performed at room temperature and strain rate 5 × 10 −3 s −1 . The results show that the microstructure was effectively refined, and the initial fiber texture became disintegrated and developed a new texture after 14 CEC passes. It was found that the strength and ductility were simultaneously increased as compared with the as-extruded alloy. In particular, the elongation and yield strength were related in a line relationship having a positive slope. As the texture changed and texture intensity decreased, substantial grain refinement was observed. The hard second-phase particles were considered to be responsible for the uncommon properties of CEC processed GW102K alloy.

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Section: Introductionmentioning

confidence: 99%

Microstructure and enhanced mechanical properties of an Mg–10Gd–2Y–0.5Zr alloy processed by cyclic extrusion and compression

Tao

Wang

Lin

et al. 2011

Materials Science and Engineering: A

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“…[8] However, due to the limited examination volume of TEM samples, the knowledge of the distributions of grain boundaries and misorientations of grain and subgrain structures has been limited. Electron backscatter diffraction (EBSD) has been widely employed to characterize quantitatively the fractions of low-angle grain boundaries (LAGBs) and high-angle grain boundaries (HAGBs), distributions of grain sizes and misorientation, and the evolution of texture and development of substructure in Mg alloys, [9] Al alloys [10] and steels, [11] after plastic deformation. However, dislocations and dislocation structures, LAGBs with misorientations typically below 2 deg and grains in general less than 3 times the EBSD step size, cannot be revealed by EBSD imaging.…”

Section: Introductionmentioning

confidence: 99%

Deformation Structures of Pure Titanium during Shear Deformation

Chen

Walmsley

et al. 2009

Metall Mater Trans A

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“…Furthermore, refined grains increase the hardness, hence elevating the wear resistance. Therefore, it is expected to result into higher wear resistance than that of the as-cast alloy as mentioned in earlier works on hot rolled [18,21,28] and extruded magnesium alloys [20,23,29,30].…”

Section: A Comparison Of the Dry Sliding Wear Behavior Of As-cast Andmentioning

confidence: 99%

Döküm Ve Haddelenmi̇ş Az31b Magnezyum Alaşiminin Kuru Şartlarda Aşinma Davranişinin Kiyaslanmasi

Mert¹

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Wear resistance is one of the important technological properties of magnesium alloys that may limit their practical applications, though limited information is available in the literature. In this study, wear behavior of ascast and hot rolled AZ31B magnesium alloy on dry-sliding conditions was investigated using a pin-on disc method. Wear rate was measured at a fixed sliding distance of 1500 m and at different sliding velocities of 0.25, 0.50, 1.00 and 2.00 m/s, as well as different applied loads of 10, 20, 40 and 80 N. Surface morphology of worn surface of the alloy was analyzed using a SEM/EDS. Hot rolled alloy exhibited a better wear resistance than the as-cast alloy due to a finer microstructure and higher hardness. Results showed that ultra-severe plastic deformation was found to be the main wear mechanism at the highest applied load and sliding velocity for the alloy at both metallurgical conditions according to wear maps.Keywords: Dry sliding wear, AZ31B cast/hot rolled magnesium alloy, wear mechanisms, wear map DÖKÜM VE HADDELENMİŞ AZ31B MAGNEZYUM ALAŞIMININ KURU ŞARTLARDA AŞINMA DAVRANIŞININ KIYASLANMASI ÖZ Aşınma direnci literatürde yeterli bilgi olmaması sebebiyle magnezyum alaşımlarının uygulama alanlarını kısıtlayabilecek önemli teknik özelliklerden biridir. Bu çalışmada pin-on disk yöntemi kullanılarak kuru çalışma şartlarında döküm ve haddelenmiş AZ31B magnezyum alaşımlarının aşınma davranışı incelenmiştir. Aşınma hızı 1500 m sabit kayma mesafesi, 0,25-0,50-1,00 ve 2,00 m/s kayma hızı ve 10-20-40 ve 80 N gibi farklı yüklerde ölçülmüştür. Aşınmış yüzeylerin yüzey morfolojisi SEM cihazı kullanılarak incelenmiştir. Haddelenmiş alaşım ince mikroyapı ve daha yüksek sertlik özelliklerinden dolayı döküm alaşımdan daha iyi aşınma direnci sergilemiştir. Aşınma haritalarına göre sonuçlar en büyük yük ve en yüksek kayma hızında aşırı plastik deformasyonun ana aşınma mekanizması olduğunu göstermiştir.Anahtar Kelimeler: Kuru aşınma, AZ31B döküm/hadde magnezyum alaşımı, aşınma mekanizmaları, aşınma haritası

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Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression

Cited by 87 publications

References 26 publications

Microstructure and enhanced mechanical properties of an Mg–10Gd–2Y–0.5Zr alloy processed by cyclic extrusion and compression

Microstructure and enhanced mechanical properties of an Mg–10Gd–2Y–0.5Zr alloy processed by cyclic extrusion and compression

Deformation Structures of Pure Titanium during Shear Deformation

Döküm Ve Haddelenmi̇ş Az31b Magnezyum Alaşiminin Kuru Şartlarda Aşinma Davranişinin Kiyaslanmasi

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