The Influences of Grain Size and Morphology on the Hot Tearing Susceptibility, Contraction, and Load Behaviors of AA7050 Alloy Inoculated with Al-5Ti-1B Master Alloy

Li, Y.; Bai, Q. L.; Liu, J. C.; Li, H. X.; Du, Qiang; Zhang, J. S.; Zhuang, Linzhong

doi:10.1007/s11661-016-3543-2

Cited by 35 publications

(26 citation statements)

References 27 publications

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“…Actually, grain refinement often delays the load onset point and thus the load development during solidification due to the finer and more equiaxed grain structure. [12,36] Moreover, the feeding ability is also important and it can be reflected by the amount of non-equilibrium eutectics (Table II). Grain-refined Al-12Zn-2Mg-2Cu has more non-equilibrium eutectics than grain-refined Al-9Zn-2Mg-2Cu, indicating a better feeding ability.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Main Elements (Zn, Mg, and Cu) on Hot Tearing Susceptibility During Direct-Chill Casting of 7xxx Aluminum Alloys

Zhang

Zhao

et al. 2019

Metall Mater Trans A

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New 7xxx aluminum alloys with high alloying contents are being designed, which could induce serious hot tearing defects during direct-chill (DC) casting. Among all factors affecting hot tearing of 7xxx alloys, undoubtedly alloying elements play a significant role. In this study, the effect of main alloying elements (Zn, Mg, and Cu) on hot tearing of grain-refined Al-xZn-yMg-zCu alloys was investigated by a dedicated hot tearing rating apparatus simulating the DC-casting process. It was found that the minimum and maximum hot tearing susceptibilities occur for 4 to 6 and 9 wt pct Zn, respectively, indicating the complicated effect of Zn content. The hot tearing resistance of grain-refined Al-9Zn-yMg-zCu alloys is enhanced with increasing Mg content but is deteriorated with increasing Cu content. This can be attributed to the interaction of the thermal stresses, melt feeding, and final eutectics. The observed tendencies of the main alloying elements on hot tearing were also confirmed for four commercial 7xxx alloys. In addition, both the load value at non-equilibrium solidus and the SKK criterion proposed by Suyitno et al. using measured load developments were found to be good indicators in predicting hot tearing susceptibility. This study can provide a beneficial guide in designing 7xxx alloys considering the potential occurrence of hot cracks beforehand.

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Section: Discussionmentioning

confidence: 99%

“…Note that grain refinement often decreases the hot tearing susceptibility of 7xxx alloys. [11][12][13] Eskin et al [14] have reviewed hot tearing in aluminum alloys. They pointed out that indeed the main alloying elements can influence the hot tearing resistance of non-grain-refined 7xxx alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Main Elements (Zn, Mg, and Cu) on Hot Tearing Susceptibility During Direct-Chill Casting of 7xxx Aluminum Alloys

Zhang

Zhao

et al. 2019

Metall Mater Trans A

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“…to have an impact of deformation mechanisms that is manifested not only at the microstructural level, but also at larger scale [46,47].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

An analysis of macro- and micro-scale residual stresses of Type I, II and III using FIB-DIC micro-ring-core milling and crystal plasticity FE modelling

Salvati

Korsunsky

2017

International Journal of Plasticity

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“…Titanium diboride (TiB 2 ) is the most widely used grain refiner for aluminum alloys. TiB 2 modifier is introduced by the "ex-situ" method using Al-5Ti-1B master alloys [10][11][12] (containing Al 3 Ti and TiB 2 particles in the aluminum matrix), or is synthesized by the "in-situ" method using K 2 TiF 6 and KBF 4 [13]. As shown by recent studies, titanium diboride particles are not sufficiently active centers of solidification by themselves and require the formation of a two-dimensional compound Al 3 Ti on their surface [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Titanium Diboride Particle Size on Structure and Mechanical Properties of an Al-Mg Alloy

Khrustalyov

Козулин

Zhukov

et al. 2019

Metals

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In the present study, aluminum alloys of the Al-Mg system with titanium diboride particles of different size distribution were obtained. The introduction of particles in the alloy was carried out using master alloys obtained through self-propagating high-temperature synthesis (SHS) process. The master alloys consisted of the intermetallic matrix Al-Ti with distributed TiB2 particles. The master alloys with TiB2 particles of different size distribution were introduced in the melt with simultaneous ultrasonic treatment, which allowed the grain refining of the aluminum alloy during subsequent solidification. It was found that the introduction of micro- and nanoparticles TiB2 increased the yield strength, tensile strength, and plasticity of as-cast aluminum alloys. After pass rolling the castings and subsequent annealing, the effect of the presence of particles on the increase of strength properties is much less felt, as compared with the initial alloy. The recrystallization of the structure after pass rolling and annealing was the major contributor to hardening that minimized the effect of dispersion hardening due to the low content of nanosized titanium diboride.

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The Influences of Grain Size and Morphology on the Hot Tearing Susceptibility, Contraction, and Load Behaviors of AA7050 Alloy Inoculated with Al-5Ti-1B Master Alloy

Cited by 35 publications

References 27 publications

Effect of Main Elements (Zn, Mg, and Cu) on Hot Tearing Susceptibility During Direct-Chill Casting of 7xxx Aluminum Alloys

Effect of Main Elements (Zn, Mg, and Cu) on Hot Tearing Susceptibility During Direct-Chill Casting of 7xxx Aluminum Alloys

An analysis of macro- and micro-scale residual stresses of Type I, II and III using FIB-DIC micro-ring-core milling and crystal plasticity FE modelling

Influence of Titanium Diboride Particle Size on Structure and Mechanical Properties of an Al-Mg Alloy

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