Toughness and fatigue behaviour of eutectic and hypereutectic Al–Si–Cu–Mg alloys produced through lost foam and squeeze casting

Lasa, L.; Rodríguez-Ibabe, J.M.

doi:10.1179/026708304x6059

Cited by 9 publications

(4 citation statements)

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“…The fatigue behaviour of Al-Si-Cu-Mg alloys is affected by various factors which include casting defects such as the porosities and oxide inclusions [5], secondary dendrite arm spacing (SDAS) [1,6], Si particles [7], and the Fe-rich intermetallic phases [8]. Overall, the microstructure exhibiting lower porosity volume fraction, finer SDAS, less brittle intermetallic phases, as well as higher Si modification causes better fatigue resistance [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zr on the high cycle fatigue and mechanical properties of Al–Si–Cu–Mg alloys at elevated temperatures

Liu

Blake

2019

Journal of Alloys and Compounds

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The Zr-modified Al-Si-Cu-Mg alloy with 0.14wt%Zr addition was studied against the counterparts of commercially used EN-AC-42000 (Al7Si0.5Cu) baseline alloy for the effect of Zr on the high cycle fatigue (HCF) and mechanical properties at elevated temperatures of 150, 200, 250 o C. It was found that the fatigue life was significantly improved by 8-10 times at the high stress amplitude of 140 MPa in the Zr-modified alloy at all different temperatures. The

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Section: Introductionmentioning

confidence: 99%

Effect of Zr on the high cycle fatigue and mechanical properties of Al–Si–Cu–Mg alloys at elevated temperatures

Liu

Blake

2019

Journal of Alloys and Compounds

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“…The fatigue process itself can be divided into four stages: (i) cyclic hardening/softening, (ii) crack nucleation, (iii) crack propagation, and (iv) overload (fracture). At low amplitudes, the nucleation stage can occupy the majority of the fatigue life, while, at high amplitudes, nucleation is accomplished within a small fraction of the fatigue life [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy

Morin

Elgallad

Doty

et al. 2016

Advances in Materials Science and Engineering

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The present study was carried out on a 380 alloy containing 9.13% Si, 3.22% Cu, 1.01% Fe, 0.06% Mg, 0.16% Mn, and 2.28% Zn. The magnesium level was increased to 0.3 and 0.55%, by adding pure Mg to the melt. Tensile and fatigue samples were produced using low pressure die casting. The results show that the average dendrite arm spacing was about 6 μm. Increasing the amount of Mg from 0.06% to 0.55% increased the volume fraction ofπ-Al8Mg3FeSi6and Q-Al5Cu2Mg8Si6phases from 0.8% to 1.7%. Following solutionizing at 490°C for 8 h, the maximum ultimate tensile strength was obtained from alloys containing 0.3% Mg. Further increases in Mg content resulted in an increase in the amount of insoluble intermetallics and, hence, low tensile strength. Aging at 155°C for times up to 25 h resulted in a linear increase in the alloy strength regardless of the amount of added Mg. Aging at 220°C, however, revealed multiple peaks corresponding to the precipitation of various phases. A good relation between the applied force and the number of cycles prior to failure was established. The alloy containing 0.3% Mg produced the best fatigue resistance. The effect of porosity was more pronounced on the fatigue samples than on the tensile bars.

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“…A glance at the recent materials engineering and science literature demonstrates the wide spread industrial application of nanotechnologies by the traditional metallurgists. By controlling the formation of nanoparticles in various alloys, researchers have increased material toughness (15,16), strength (16,17) and creep (18) and fatigue (16) resistance, improved age hardening kinetics (17,19), increased the quality of hot-isostatically pressed super alloys (20), improved the mechanical properties of cast alloys (21), developed superior shape memory characteristics (22), increased the work hardening rates (23) and induced superplasticity (24).…”

Section: Traditional Metallurgy Nanoparticles and The Relatively Recmentioning

confidence: 99%

Traditional Metallurgy, Nanotechnologies, and Structural Materials: A Sorby Award Lecture

Louthan

2007

J Fail. Anal. and Preven.

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Traditional metallurgical processes are among the many "old fashion" practices that use nanoparticles to control the behavior of materials. Many of these practices were developed long before microscopy could resolve nanoscale features, yet the practitioners learned to manipulate and control microstructural elements that they could neither see nor identify. Furthermore, these early practitioners used that control to modify microstructures and develop desired material properties. Centuries old colored glass, ancient high strength steels and medieval organ pipes derived many of their desirable features through control of nanoparticles in their microstructures. Henry Sorby was among the first to recognize that the properties of rocks, minerals, metals and organic materials were controlled by microstructure. However, Mr. Sorby was accused of the folly of trying to study mountains with a microscope. Although he could not resolve nanoscale microstructural features, Mr. Sorby's observations revolutionized the study of materials.The importance of nanoscale microstructural elements should be emphasized, however, because the present foundation for structural materials was built by manipulating those features. That foundation currently supports several multibillion dollar industries but is not generally considered when the nanomaterials revolution is discussed. This lecture demonstrates that using nanotechnologies to control the behavior of metallic materials is almost as old as the practice of metallurgy and that many of the emergent nanomaterials technologists are walking along pathways previously paved by traditional metallurgists.

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Toughness and fatigue behaviour of eutectic and hypereutectic Al–Si–Cu–Mg alloys produced through lost foam and squeeze casting

Cited by 9 publications

References 50 publications

Effect of Zr on the high cycle fatigue and mechanical properties of Al–Si–Cu–Mg alloys at elevated temperatures

Effect of Zr on the high cycle fatigue and mechanical properties of Al–Si–Cu–Mg alloys at elevated temperatures

Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy

Traditional Metallurgy, Nanotechnologies, and Structural Materials: A Sorby Award Lecture

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