On the tensile failure induced by defect band in high pressure die casting of AM60B magnesium alloy

Li, X.; Xiong, Shengwu; Guo, Zhipeng

doi:10.1016/j.msea.2016.08.039

Cited by 28 publications

(5 citation statements)

References 33 publications

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“…To investigate the crack initiation and propagation, the in-situ tensile test is widely used. [23,24] As shown in Fig.1, a servo-hydraulic loading system was installed in the vacuum chamber of a scanning electron microscope (Shimadzu Corporation, Japan).…”

Section: Fracture Mechanismmentioning

confidence: 99%

Microstructure, mechanical properties and fracture mechanism of Ti2AlC reinforced AZ91D composites fabricated by stir casting

Wang

Zhao

et al. 2017

Journal of Alloys and Compounds

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Mg-alloy (AZ91D) based composites reinforced by Ti 2 AlC MAX phases particles were firstly fabricated by the stir casting technology. The mechanical properties in relationship with the microstructure were carefully investigated. The Ti 2 AlC particles were generally distributed along α-Mg grain boundaries and strongly impeded the dendritic growth of α-Mg. Yield strength, Vikers hardness, ultimate compressive strength, and Young's moduli increased with increasing Ti 2 AlC fraction in composites, while the optimized ultimate tensile strength was found for 10vol% of Ti 2 AlC. The theoretical calculation on tensile yield strength reveals that individual strengthening contribution was mainly from Hall-Petch strengthening and Forest strengthening, followed by Orwan strengthening effect. The elastic moduli were predicated by Halpin-Tsai approach the mixture rule and the Hashin and Shtrickman equation. One aspect ratio of 3 was found by fitting Halpin-Tsai approach with experimental results. In-situ tensile test revealed the cracks were initiated in Ti 2 AlC particles and propagated along α-Mg grain boundaries. During this process, no decohesion occurred at the Ti 2 AlC and AZ91D interfaces.

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Section: Fracture Mechanismmentioning

confidence: 99%

Microstructure, mechanical properties and fracture mechanism of Ti2AlC reinforced AZ91D composites fabricated by stir casting

Wang

Zhao

et al. 2017

Journal of Alloys and Compounds

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“…ESCs tend to concentrate at the central part of a casting, causing microstructural segregation and hence, leading to the deterioration of mechanical properties [12]. Both the size and spatial distribution of ESCs are believed to have significant influence on the strength and plasticity of castings [7,13,14]. In this respect, understanding the segregation behaviour of ESCs is crucial for process optimization to eliminate the microstructural segregation.…”

mentioning

confidence: 99%

Modelling flow-induced microstructural segregation in semi-solid metals

Fonseca

et al. 2022

Materials & Design

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“…From this, it was deduced that primary aluminium globules migrate toward the centre of the casting and that the bands are formed by the remaining liquid from the semi-solid slurry. These bands have been associated with material failure in tensile test trials in previous research and, therefore, pose a liability for critical parts, for example in the automotive industry [5].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Mechanisms for Particle Migration in Semi-Solid High Pressure Die Cast Aluminium-Silicon Alloys

Law

Hulme-Smith

Matsushita

et al. 2020

JMMP

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In semi-solid metal high pressure die casting and in conventional high pressure die casting, it is common to find a defect band just below the surface of the component. The formation of these bands is not fully understood. However, there are several theories as how they occur, and it has been suggested that segregation is caused by the migration of aluminium-rich externally solidified crystals. In the present work the formation of these bands is investigated theoretically by reviewing suitable potential mechanisms for the migration of such crystals. Two mechanisms are identified as the most probable: Saffman lift force and the Mukai-Lin-Laplace effect. However, it was not possible to identify which of these two mechanisms acted in the case studies. Further testing is required to identify the mechanism that is causing the migration of the aluminium globules and suitable tests are proposed.

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On the tensile failure induced by defect band in high pressure die casting of AM60B magnesium alloy

Cited by 28 publications

References 33 publications

Microstructure, mechanical properties and fracture mechanism of Ti2AlC reinforced AZ91D composites fabricated by stir casting

Microstructure, mechanical properties and fracture mechanism of Ti2AlC reinforced AZ91D composites fabricated by stir casting

Modelling flow-induced microstructural segregation in semi-solid metals

Assessment of Mechanisms for Particle Migration in Semi-Solid High Pressure Die Cast Aluminium-Silicon Alloys

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