Microstructure, mechanical and corrosion properties of novel Mg-Sn-Ce alloys produced by high pressure die casting

Özarslan, Selma; Şevik, Hüseyin; Sorar, Idris

doi:10.1016/j.msec.2019.110064

Cited by 34 publications

(11 citation statements)

References 37 publications

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“…Otomotiv sektöründe sıklıkla ihtiyaç duyulan yassı mamul haline getirilmesi için haddeleme veya yapısal uygulamalar için ekstrüzyon gibi işlemler sınırlanmaktadır. Magnezyum alaşımlarının döküm yoluyla üretilmesinde ise bu malzemenin oksijene karşı yüksek afinitesinden dolayı koruyucu atmosfer kullanılması gereklidir [18]- [21]. Üstelik geleneksel gravite döküm yöntemleri ile karmaşık şekilli parça üretiminin mümkün olmaması nedeniyle yüksek basınçlı döküm işlemi kullanılsa da bu yöntemde üretilebilecek parça büyüklüğü kısıtlıdır [22].…”

Section: Igi̇ri̇şunclassified

Magnezyum ve Alaşımlarının Toz Metalurjisi İşlemleri

Gökçe

2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Bu çalışmada, günden güne daha geniş alanlarda kullanılan magnezyum tozmetal alaşımların endüstriyel uygulamalarda kullanılabilirliği incelenmiştir. Bu malzemenin hegzagonal sıkı paket kafes yapısından dolayı plastik deformasyonunda yaşanan zorlukları aşmak için geleneksel plastik deformasyon yöntemleri yerine toz metalurjisi yöntemi ile şekillendirilebilirliği hakkında literatürde bulunan çalışmalar derlenmiştir. Özellikle magnezyum partiküllerinin üretimi sürecinde oluşan yüzey oksidi tabakasının elimine edilmesi için kullanılabilecek yöntemlerle ilgili çalışmaların bulguları özetlenmiştir. Sonuç olarak press-sinter yöntemine göre daha sofistike yöntemler veya ikincil işlemler kullanılması durumunda döküm alaşımlarına göre daha yüksek dayanım gösteren Mg alaşımlarının üretiminin mümkün olduğu ve gelişen partikül malzeme üretim yöntemleri (Seçici lazer sinterleme, direkt enerji biriktirme gibi) ile birlikte yakın gelecekte tozmetal magnezyum alaşımlarının daha geniş alanlarda kullanılacağı öngörülmektedir.

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Section: Igi̇ri̇şunclassified

Magnezyum ve Alaşımlarının Toz Metalurjisi İşlemleri

Gökçe

2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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“…Anticorrosion performance could be quickly understood from the electrochemical tests of the samples, such as corrosion potential and corrosion current density, that could be determined by the potentiodynamic polarization curves. [33][34][35] Potentiodynamic polarization tests were conducted using a CHI660C three-electrode system, in which a saturated calomel electrode and a platinum electrode were used for the reference electrode and the counter electrode, respectively. Before potentiodynamic polarization tests, the surface of the samples was mechanically polished and then cleaned by ethanol with a purity of 99.7%.…”

Section: Electrochemical Testsmentioning

confidence: 99%

A dense and compact laser cladding layer with solid metallurgical bonding significantly improved corrosion resistance of Mg alloy for engineering applications

Li¹,

Yi²,

Jia

et al. 2020

Materials & Corrosion

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Although Mg alloy attracts great attention for engineering applications because of high specific strength and low density, low corrosion resistance limits its extensive use. In this study, Mg–Al–Zn–Mn alloy was treated via a laser cladding process to generate a dense and compact laser cladding layer with solid metallurgical bonding on the substrate for improving corrosion resistance, effectively hindering the corrosion pervasion into Mg alloy. The corrosion current density declined from 103 μA/cm2 for Mg alloy to 13 μA/cm2 for the laser cladding layer in NaCl aqueous solution. Moreover, the laser cladding layer was slightly corroded in comparison with Mg alloy in NaCl aqueous solution. Besides, the microhardness of the cladding layer reached a mean value of 170.5 HV, 3.1 times of Mg alloy (56.8 HV) due to the in situ formation of hardening intermetallic phases. Wear resistance of laser cladding layer was also obviously improved. These results demonstrated that the laser cladding layer obviously enhanced anticorrosion property of Mg alloy for engineering applications.

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“…It has a high melting point of 1044 K, high hardness, and it is still stable at a high temperature, which is similar to the behavior of Mg 5 RE [ 13 ]. Owing to similarity to Mg–RE magnesium alloys, Mg–Sn magnesium alloys have a great potential to be used as heat-resistant magnesium alloys [ 14 , 15 ]. Mg–Sn binary alloys are rarely used in industry due to poor mechanical properties [ 16 ], so aluminum was added as the third element to improve it; this mainly plays the role of solid solution strengthening [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Hot Deformation Behavior of the Mg–8 wt.% Sn–1.5 wt.% Al Alloy

Sun

Zhang

et al. 2021

Materials

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Mg–Sn–Al alloy is a new type of heat-resistant magnesium alloy with great potential and the hot deformation process of this alloy is of great significance for its application. The microstructure, hot deformation behavior, textural evolution, and processing map of a Mg–8 wt.% Sn–1.5 wt.% Al alloy were studied. A Gleeble 1500 D thermo-mechanical simulator was used. The temperature of deformation was 653 to 773 K, the strain rate was 0.001–1 s−1, and the maximum deformation degree was 60%. The obtained results show that the rheological stress of the alloy decreases with an increase in deformation temperature and increases with an increase in the strain rate. The alloy is completely dynamically recrystallized at 653 K, and the entire structure is formed of homogeneous crystals/grains, with small secondary phase particles distributed at the crystal boundary. The mean apparent activation energy of hot compression deformation is 153.5 kJ/mol. The Mg–8 wt.% Sn–1.5 wt.% Al alloy exhibits excellent plastic deformation properties, an expansive thermal processing interval, and a narrow instability zone under the test temperature and deformation rate. The optimal process parameters of the alloy comprise deformation temperatures between 603 and 633 K and strain rates of 0.03 to 0.005 s−1.

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Microstructure, mechanical and corrosion properties of novel Mg-Sn-Ce alloys produced by high pressure die casting

Cited by 34 publications

References 37 publications

Magnezyum ve Alaşımlarının Toz Metalurjisi İşlemleri

Magnezyum ve Alaşımlarının Toz Metalurjisi İşlemleri

A dense and compact laser cladding layer with solid metallurgical bonding significantly improved corrosion resistance of Mg alloy for engineering applications

Microstructure and Hot Deformation Behavior of the Mg–8 wt.% Sn–1.5 wt.% Al Alloy

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