Effect of arc re-melting on microstructure, mechanical and tribological properties of commercial 390A alloy

Hekìmoğlu, Ali Paşa; Çalış, Merve

doi:10.1016/s1003-6326(21)65653-4

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…Pereira et al [172] recycled zirconium alloy chips using EAF. Hekimo glu et al [173] remelted the 390 A alloy and observed a uniform and equiaxed distribution of grains. Iron and scrap are reduced from iron ore charged in the furnace.…”

Section: Electric Arc Furnace (Eaf)mentioning

confidence: 99%

Recent Advancements in Material Waste Recycling: Conventional, Direct Conversion, and Additive Manufacturing Techniques

Golvaskar,

Ojo,

Kannan

2024

Recycling

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To improve the microstructure and mechanical properties of fundamental materials including aluminum, stainless steel, superalloys, and titanium alloys, traditional manufacturing techniques have for years been utilized in critical sectors including the aerospace and nuclear industries. However, additive manufacturing has become an efficient and effective means for fabricating these materials with superior mechanical attributes, making it easier to develop complex parts with relative ease compared to conventional processes. The waste generated in additive manufacturing processes are usually in the form of powders, while that of conventional processes come in the form of chips. The current study focuses on the features and uses of various typical recycling methods for traditional and additive manufacturing that are presently utilized to recycle material waste from both processes. Additionally, the main factors impacting the microstructural features and density of the chip-unified components are discussed. Moreover, it recommends a novel approach for recycling chips, while improving the process of development, bonding quality of the chips, microstructure, overall mechanical properties, and fostering sustainable and environmentally friendly engineering.

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Section: Electric Arc Furnace (Eaf)mentioning

confidence: 99%

Recent Advancements in Material Waste Recycling: Conventional, Direct Conversion, and Additive Manufacturing Techniques

Golvaskar,

Ojo,

Kannan

2024

Recycling

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“…However, for aluminum-silicon alloys with a silicon content exceeding 4%, the refining effect of titaniumcontaining refiners decreases due to the toxic reaction between titanium and silicon. In the case of Al-Si alloys, the microstructure depends not only on its dendritic structure but also on the size and morphology of the eutectic Si particles [7][8][9]. Researchers use two or more refining agents and modifiers to refine α-Al and eutectic Si in Al-Si alloys [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of High-Frequency Electric Pulse on the Solidification Microstructure and Properties of Hypoeutectic Al-Si Alloy

Guo,

Wang,

Zhang

et al. 2024

Materials

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The effects of different pulse frequencies on the microstructure grain size and solid solubility of Al-9Si alloy were systematically investigated using OM, SEM, and EDS. The impact on the mechanical properties of the alloy was analyzed using a micro-Vickers hardness tester and multifunctional friction tester. During solidification, the Al-9Si alloy is exposed to high-frequency electric current pulses with a current density of 300 A/cm2 and frequencies of 0 Hz, 500 Hz, 1000 Hz, and 2000 Hz. The experimental results show that the Lorentz force also increases as the high-frequency pulse frequency increases. Intense electromagnetic stirring leads to grain refinement. However, as the pulse frequency continues to grow, the combined effect of Joule heating and Lorentz force results in an enlargement of the melt zone and an increase in grain size. At a pulse frequency of 1000 Hz, the eutectic structure size of the Al-9Si alloy is optimal, with the average size being reduced to 13.87 μm and a dense distribution, effectively eliminating primary Si. The EDS results revealed that the high-frequency pulse led to a more uniform distribution of Si elements within the matrix, and the solid solubility of Si in the α-Al matrix increased to a maximum value of 1.99%, representing a 39.2% increase. At a pulse frequency of 1000 Hz, the sample demonstrates the most favorable mechanical properties, with the friction coefficient reaching a minimum value of 0.302, representing a 37.7% decrease in the average friction coefficient. The results demonstrate that high-frequency pulsing is an effective method for enhancing the mechanical properties of Al-9Si alloy.

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“…Aşınma deneyleri yağsız ortamda, 5 N'luk sabit yük altında ve 0,15 m/s'lik kayma hızında 1000 m'lik kayma mesafesi tamamlanarak gerçekleştirildi. Deney parametreleri literatürde yer alan benzer çalışmalar[20,29,34] dikkate alınarak belirlendi. Numuneler testlerden önce ve sonra ultrasonik bir temizleyicide art arda trikloretilen (C2HCl3) ve alkol-aseton karışımı banyolarında temizlendi.…”

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T5 ve T6 ısıl işlemlerinin Zn-40Al-2Cu-0,1Sr alaşımının yapısal, mekanik ve tribolojik özelliklerine etkilerinin incelenmesi

Hekimoğlu,

Hacıosmanoğlu,

Tellioğlu

et al. 2024

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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Bu çalışmada T5 ve T6 ısıl işlemlerinin Zn-40Al-2Cu-0,1Sr alaşımının yapısal, mekanik ve tribolojik özelliklerine etkilerinin belirlenmesi amacıyla gerekli sayıda külçe kokil kalıba döküm yöntemiyle üretildi. Üretilen alaşımın yapı ve özellikleri uygun deneysel yöntemlerle araştırıldı. Söz konusu alaşımının dökülmüş durumdaki mikroyapısının α dendritleri ile dendritler arası bölgelerde yer alan ötektoid dönüşüm ürünü α+η, bakırca zengin ε (CuZn4) ve μ(SrZnx) fazlarından oluştuğu gözlendi. Uygulanan T5 ısıl işleminin bu alaşımın dendritik yapısında belirgin bir değişime yol açmadığı, T6 ısıl işleminin ise bu yapıyı önemli ölçüde değiştirdiği gözlendi. T5 ısıl işleminin incelenen alaşımın sertlik ve çekme dayanımını azaltırken kopma uzamasını az da olsa artırdığı belirlendi. T6 ısıl işleminin alaşımın sertlik ve çekme dayanımını artırdığı, kopma uzaması değerini ise azalttığı gözlemlendi. Yapılan değerlendirme sonucunda her iki ısıl işlemin de (T5 ve T6) söz konusu alaşımın aşınma direncini artırdığı belirlendi. Uygulanan ısıl işlemlerin alaşımın mekanik ve tribolojik özellikleri üzerindeki etkileri yapısal değişimlere dayandırılarak açıklandı.

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Effect of arc re-melting on microstructure, mechanical and tribological properties of commercial 390A alloy

Cited by 6 publications

References 40 publications

Recent Advancements in Material Waste Recycling: Conventional, Direct Conversion, and Additive Manufacturing Techniques

Recent Advancements in Material Waste Recycling: Conventional, Direct Conversion, and Additive Manufacturing Techniques

Effect of High-Frequency Electric Pulse on the Solidification Microstructure and Properties of Hypoeutectic Al-Si Alloy

T5 ve T6 ısıl işlemlerinin Zn-40Al-2Cu-0,1Sr alaşımının yapısal, mekanik ve tribolojik özelliklerine etkilerinin incelenmesi

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