Directional solidification of Zn-Al-Cu eutectic alloy by the vertical Bridgman method

Büyük, Uğur; Engin, Sevda; Maraşlı, Necmetti̇n

doi:10.2298/jmmb140304007b

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…The increased copper mass concentration causes crystallization CuZn4 (ε) phases in the form of broken quasi-regular lamellas. This structure change is observed for all used and applied solidification parameters [13].…”

Section: Introductionmentioning

confidence: 67%

Effect of Mg addition on the crystallization kinetics of Zn-Al-Cu alloys

Krupiński

Labisz

Jonda

2020

J min metall B Metall

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In this work, the main aim was to determine the effect of Mg addition on the crystallization kinetics and microstructure of Zn-10Al-1Cu alloy. The effectiveness of magnesium addition was detected on the basis of microstructure morphology investigations and changes occurring in the cooling curves of the investigated alloys. To describe the phenomena that occurred in the material during solidification under various conditions caused by a change in the chemical composition as a result of the appliance of modifiers, it was decided to use methods of thermal derivative analysis, allowing to effectively and accurately describe the crystallization kinetics of the tested materials. The scientific goal of the presented work was examination of the impact of magnesium addition and effect of the crystallization kinetics on the examined alloys. Determining the relationship between the changes in the derivative curve and the related microstructure, the influence of modifiers addition was analysed. The addition of Mg caused a shift of the solidification temperature values of phases and eutectics and monotectoid transformation (????) to lower temperature values, as well as the change of the morphology of the occurring eutectic ??+?.

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Section: Introductionmentioning

confidence: 67%

Effect of Mg addition on the crystallization kinetics of Zn-Al-Cu alloys

Krupiński

Labisz

Jonda

2020

J min metall B Metall

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“…Bu durum Al9NiFe pul intermetalik fazlarının üstel değerinde Jackson-Hunt teorik modelinin öngürdüğü değerden sapmaya sebebiyet verdiği düşünülmektedir. Bununla birlikte bu çalışmada elde edilen değerler, benzer şartlarda yapılan araştırmalarda [11,13,15], ötektik mesafenin sıcaklık gradyentine bağlı üstel bağıntıları ile yakın değerlerde olduğu belirlenmiştir. (Tablo 1).…”

Section: Sıcaklık Gradyentinin öTektik Mikroyapıya Etkisiunclassified

Sicaklik Gradyenti̇ni̇n Mi̇kroyapi Ve Mi̇krosertli̇ğe Etki̇si̇

Engin

Büyük

Maraşlı

2020

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Al-6.5Ni-1.5Fe (ağ.) ötektik bileşiminde hazırlanan alaşım sabit katılaştırma hızında (V = 16.57 µm/s) ve beş farklı sıcaklık gradyentinde (G = 3.23-8.52 K/mm) Bridgman Tipi fırın yardımıyla kontrollü doğrusal katılaştırılarak sıcaklık gradyentinin (G) alaşımın mikroyapı (λ) ve mikrosertlik (HV) özelliklerine etkisi araştırılmıştır. Yapılan deneyler sonucunda oluşan mikroyapılar arası mesafe ve mikrosertlik değerleri ölçülerek sıcaklık gradyentinin mikroyapı ve mikrosertlik üzerine etkisi ortaya çıkarılmıştır. Bu fiziksel özellikler arasındaki ilişki ise lineer regresyon analizi ile belirlenerek benzer deneysel sonuçlarla elde edilen veriler kıyaslanmıştır.

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“…When an alloy is solidified, the most common solid morphology is eutectic or dendritic microstructures (Trivedi and Kurz, 1994), which are characterized by microstructure parameters (eutectic or dendritic spacing). Especially in recent years, there has been numerous works on characterizing the microstructure parameters of ternary aluminum alloys depending on the growth velocity (Böyük et al, 2009, Böyük et al, 2011, Böyük, 2012, Büyük et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu Content and Growth Velocity on the Microstructure Properties of the Directionally Solidified Al-Mn-Cu Ternary Alloys

Büyük

Çadırlı

Kaya

et al. 2021

EJONS

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In this work, influences of composition (Cu content) and growth velocity (V) on the microstructure (dendritic spacing) of Al–Mn–Cu ternary alloys have been investigated. Al–1.9Mn–xCu (x=0.5, 1.5 and 5 wt. %) alloys were prepared using metals of 99.90% high purity in the vacuum atmosphere. These alloys were directionally solidified upwards under various growth velocities (8.3–978 m/s) using a Bridgman-type directional solidification furnace at a constant temperature gradient (7.1 K/mm). Measurements of primary dendrite arm spacing () of the samples were carried out and then expressed as functions of growth velocity and Cu content. Especially, cell-dendritic transition was detected for low growth velocity (41.6 m/s) for alloys containing 0.5 and 1.5Cu. It has been found that the values of  decrease with increasing V and decreasing Cu content. Keywords: Aluminum alloys, Solidification, Cell-dendritic transition, Dendrite arm spacing

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Directional solidification of Zn-Al-Cu eutectic alloy by the vertical Bridgman method

Cited by 10 publications

References 6 publications

Effect of Mg addition on the crystallization kinetics of Zn-Al-Cu alloys

Effect of Mg addition on the crystallization kinetics of Zn-Al-Cu alloys

Sicaklik Gradyenti̇ni̇n Mi̇kroyapi Ve Mi̇krosertli̇ğe Etki̇si̇

Effect of Cu Content and Growth Velocity on the Microstructure Properties of the Directionally Solidified Al-Mn-Cu Ternary Alloys

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