Effect of Second Phase Particles on Grain Growth for Nanocrystalline AZ31 Mg Alloy by Phase Field Methods

Wu, Yan

doi:10.1051/matecconf/20152502006

Cited by 3 publications

(4 citation statements)

References 26 publications

(42 reference statements)

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“…Due to the limited data collected for AZ91 at 450 • C, the average grain growth exponent n of AZ91 magnesium alloy at 300-400 • C is 2.5. The real n of AZ31, AZ61, and AZ91 Mg alloys are all larger than the theoretical n = 2 [10]. The possible impact of anisotropy on boundary energy and mobility is enhanced.…”

Section: Deviation Of Grain Growth Exponent Nmentioning

confidence: 72%

“…The kinetic curves and activation energy of the grain growth Q at different annealing times for all of the temperatures investigated in this study can be seen in Figure 9. The nonlinear Hillert equation is chosen to describe the growth kinetics of grains [10,11]:…”

Section: Grain Growth Kineticsmentioning

confidence: 99%

“…The results show that the second phase particles during annealing can obtain fine and uniform grain size. Chang and Wu et al [9,10] examined the effects of the second phase particle morphology, volume fraction, and size on grain growth by a phase field method, and small needle-like second phase particles can effectively slow down grain growth. Apparently, the second phase The 1 mm thick Mg-xAl-1Zn (x = 3, 6, 9) alloys plates were prepared by direct casting and subsequent hot extrusion.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Al Content on the Microstructural and Grain Growth Kinetics of Magnesium Alloys

Chen

Huang

et al. 2022

Metals

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In order to control the grain size in thermomechanical processing, the grain growth behavior of hot extruded Mg–xAl–1Zn (x = 3, 6, 9) alloys and their relationship with second phase particles and solutes were investigated. The growth rate of AZ61 is greater than that of AZ31 and AZ91 at 300 °C, 350 °C, 400 °C, and 450 °C under isothermal annealing. The average grain growth exponents n of Mg–xAl–1Zn (x = 3, 6, 9) alloys were 2.26, 2.33, and 2.53 at 300–400 °C, respectively. The deviation from the theoretical value of 2 was attributed to the hindrance of grain boundary migration of Al-rich second phase particles and solute Al. Microscopic observations show that the grain size of the annealed samples is closely related to the shape, volume fraction, size, and distribution position of the second phase particles. Significantly, the pinning effect is stronger for lamellar and network-like second phase particles. In addition, the pinning effect of Al-rich second phase particles plays a more important role in grain refinement than the dragging of solute Al. The growth of abnormal grains in the microstructure is attributed to the high energy difference between the preferentially oriented <112¯0> grains and the surrounding grains, which drives the grain boundaries to overcome the same pinning force of the second phase particles.

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Section: Deviation Of Grain Growth Exponent Nmentioning

confidence: 72%

Section: Grain Growth Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Al Content on the Microstructural and Grain Growth Kinetics of Magnesium Alloys

Chen

Huang

et al. 2022

Metals

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“…Additionally, when second-phase particle size is smaller than a critical value, the larger particle size generates a greater pinning effect on the grain boundary migration. When the particle size is larger than the critical value, the larger particle size plays a smaller pinning effect on the grain growth [47].…”

Section: Resultsmentioning

confidence: 99%

Abnormal grain growth induced by <112̄0> orientation of AZ31 magnesium alloy

Chen

Peng

et al. 2023

Materials Science and Technology

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The abnormal grain growth behaviour and preferential orientation of AZ31 Mg alloy were systematically examined. Abnormal grain growth was observed after annealing at 500°C for 9 h, and the grain growth rate was 1.3 mm h−1. Due to the abnormal grain growth, the activation energy of grain growth was reduced from 172 to 104 KJ mol−1. The abnormal grains with <11 [Formula: see text] 0> orientation grew preferentially, which resulted in the increase of the <11 [Formula: see text] 0> type texture intensity and the decrease of the <0001>. The energy difference of the misorientation is the main driving force for the formation of abnormal grains with <11 [Formula: see text] 0> orientation.

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Sürtünme Karıştırma Prosesi ile Elde Edilen Yüzey Metal Matrisli Kompozitlerin Mekanik Özelliklerini Geliştiren Çoklu Mekanizmalar

Gençer

2021

Mühendis Ve Makina

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Sürtünme karıştırma prosesi (SKP), sürtünme karıştırma kaynağı (SKK) yöntemi esaslı olup, metalik malzemelerin özelliklerini iyileştirmek için geliştirilmiş bir katı hal yöntemidir. Yöntem ile sert ikincil faz partiküllerin matris yapısına dağıtılarak eklenebilme (yerleştirilebilme) imkanı, yöntemin sonradan metal matrisli yüzey kompoziti (MMYK) üretiminde de yaygın şekilde kullanılmasını sağlamıştır. Basit, çevreci ve düşük maliyetli bir katı hal yöntemi olması, yüzey kompoziti üretiminde kullanılan birçok sıvı ve gaz hal yöntemlerine göre daha ön plana çıkmasını sağlamıştır. Sürünme karıştırma prosesiyle metal matrisli yüzey kompoziti elde ederken malzemenin mikroyapısının ve mekanik özelliklerinin geliştirilmesinde birçok farklı mekanizma birlikte rol oynamaktadır. Matris yapısında elde edilen bu mukavemet arttırıcı mekanizmalar, yöntemin işlem gören malzemeye kazandırdığı kendine has özellikler ile kullanılan sert ikincil faz partiküllerin matris yapısına dağılmasıyla gelişen özelliklerin melezlenmesi ile sağlanmaktadır. Çalışmada SKP ile elde edilen MMYK’ların mekanik özelliklerindeki gelişmede sert ikincil faz partiküllerin, dinamik rekristalizasyonun, Zener sabitlemenin (iğneleme) ve Orowan mekanizmasının etkileri incelenmiştir.

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Effect of Second Phase Particles on Grain Growth for Nanocrystalline AZ31 Mg Alloy by Phase Field Methods

Cited by 3 publications

References 26 publications

Effect of Al Content on the Microstructural and Grain Growth Kinetics of Magnesium Alloys

Effect of Al Content on the Microstructural and Grain Growth Kinetics of Magnesium Alloys

Abnormal grain growth induced by <112̄0> orientation of AZ31 magnesium alloy

Sürtünme Karıştırma Prosesi ile Elde Edilen Yüzey Metal Matrisli Kompozitlerin Mekanik Özelliklerini Geliştiren Çoklu Mekanizmalar

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