Aluminium PM ‘is a challenge that industry can overcome’

Schubert, Thomas; Weißgärber, Thomas; Kieback, Bernd; Balzer, Harald; Neubing, H.-C.; Baum, U.; Braun, Reinhold

doi:10.1016/s0026-0657(05)00370-x

Cited by 15 publications

(9 citation statements)

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“…Alüminyum tozlarının şekillendirme esnasında kalıp duvarına sıvanması, kalıba soğuk kaynaklanarak birleşmesi ve iyi akış özelliği göstermemesinden dolayı TM sektörünün alüminyum alaşımlarına ilgisi ancak 1940'lı yıllarda görülmüştür [18]. TM yöntemiyle üretilen parçaların büyük kısmı otomotiv imalat sektöründe kullanılmaktadır [19]. Bu parçaların büyük kısmından ise diferansiyel ve motor parçaları olarak yararlanılmaktadır (Şekil 5a) ve genellikle demir esaslı tozlar kullanılmaktadır.…”

Section: Alümi̇nyum Toz Metalurji̇si̇unclassified

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: Alümi̇nyum Toz Metalurji̇si̇unclassified

Magnezyum ve Alaşımlarının Toz Metalurjisi İşlemleri

Gökçe

2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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“…Over the decades, the transition from iron-based heavy alloys to lighter alloys has continued to gain more attention in the automotive and aerospace industries, due to the growing demand for weight reduction, improved fuel economy, and, therefore, less pollutant vehicles. To be considered for such purposes, light alloys must have sufficiently high mechanical properties (i.e., hardness and tensile strength) and, in some cases, well-controlled coefficients of thermal expansion [ 1 , 2 , 3 , 4 , 5 , 6 ]. The need for new materials capable of meeting increasingly stringent requirements has led to the development—in the last two decades—of low-weight metal matrix composites (MMCs).…”

Section: Introductionmentioning

confidence: 99%

Effects of Fused Silica Addition on Thermal Expansion, Density, and Hardness of Alumix-231 Based Composites

Rodrigues

Marinković

2022

Materials

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Fused silica is a ceramic with promising applications as a filler in composites due to its near-zero thermal expansion. Substitution of heavy cast iron with Al-based light alloys is of utmost importance for the automotive industry. However, the high thermal expansion of Al alloys is an obstacle to their use in some applications. As such, ceramic fillers are natural candidates for tuning thermal expansion of Al-based matrices, due to their inherently moderate or low thermal expansion. Alumix-231 is a new promising alloy, and fused silica has never been used before to lower its thermal expansion. Composites with the addition of 5 to 20 vol.% of fused silica were developed through powder metallurgy, and the best results in terms of reduction of thermal expansion were reached after liquid phase sintering at 565 °C. Coefficients of thermal expansion as low as 13.70 and 12.73 × 10−6 °C−1 (between 25 and 400 °C) were reached for the addition of 15 and 20 vol.% of fused silica, a reduction of 29.9% and 34.8%, respectively, in comparison to neat Alumix-231. In addition, the density and hardness of these composites were not significantly affected, since they suffered only a small decrease, no higher than 6% and 5%, respectively. As such, the obtained results showed that Alumix-231/fused silica composites are promising materials for automotive applications.

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“…Therefore, P/M technology presents very attractive advantages for different industrial sectors with reduction of manufacturing cost. The manufacture of aluminium alloys parts in sectors such as the automotive [8,9,10,11,12] has notably increased in the last decade, becoming the biggest customer of P/M technology.…”

Section: Introductionmentioning

confidence: 99%

Age Hardening of Extruded AA 6005A Aluminium Alloy Powders

et al. 2019

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Pre-alloyed micron-sized 6005A Al alloy (AA 6005A) powders, with a Mg/Si atomic ratio of 0.75, obtained by high pressure inert gas atomization were consolidated by uniaxial cold pressing at 200 MPa into cylindrical Al containers and hot extruded at 450, 480 and 500 °C with an extrusion rate of 7:1, followed by artificial T6 precipitation hardening. Ageing conditions were varied between 170 °C and 190 °C and times of 6, 7 and 8 hours. The microstructure of the extruded profiles was analysed using X-Ray diffractometry (XRD), light optical microscopy (LOM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Differential scanning calorimetry (DSC) was used to study the possible phase transformations. After our results, the peak-aging hardness condition was achieved at 180 °C for 6 h. Mechanical properties of the powder metallurgy (P/M) aluminium alloys consolidated by hot extrusion were superior to those of the extruded profiles of wrought alloy using conventional ingot metallurgy (I/M) billets. AA 6005A wrought P/M alloy via T6 heat treatment shown yield stress of 317 MPa and elongation of 21% at the extrusion pre-heating temperature of 500 °C.

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Aluminium PM ‘is a challenge that industry can overcome’

Cited by 15 publications

References 0 publications

Magnezyum ve Alaşımlarının Toz Metalurjisi İşlemleri

Magnezyum ve Alaşımlarının Toz Metalurjisi İşlemleri

Effects of Fused Silica Addition on Thermal Expansion, Density, and Hardness of Alumix-231 Based Composites

Age Hardening of Extruded AA 6005A Aluminium Alloy Powders

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