Impact of melt conditioning and filtration on iron-rich β phase in AlSi9Cu3 and its fatigue life studied by μCT

Wagner, R.; Seleznev, Mikhail; Fischer, Hendrik; Ditscherlein, Ralf; Becker, Hanka; Dietrich, Björn; Keßler, A.; Leißner, Thomas; Wolf, Gotthard; Leineweber, Andreas; Peuker, Urs A.; Biermann, Horst; Weidner, Anja

doi:10.1016/j.matchar.2021.111039

Cited by 18 publications

(7 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1] This β-phase leads to negative influences on the mechanical and casting properties. [2] Its presence promotes shrinkage porosity and prevents feeding by blocking the molten metal. [3,4] In addition, stress concentrations occur at the edges of the coarse plates, what reduces the ductility of the castings.…”

Section: Introductionmentioning

confidence: 99%

Removal of Iron from a Secondary Al–Si Die‐Casting Alloy by Metal Melt Filtration in a Laboratory Filtration Apparatus

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of Iron from a Secondary Al–Si Die‐Casting Alloy by Metal Melt Filtration in a Laboratory Filtration Apparatus

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Regarding their previously detected temperature–time plots, both samples exhibit pre‐dendritic and, thus, primary intermetallic particles, which have been widely described in the literature. [ 1,14,15,21–24 ]…”

Section: Resultsmentioning

confidence: 99%

“…[ 5,7,8 ] In fatigue crack propagation studies, the crack initiation site has been demonstrated on the plate‐like β ‐morphology, where the plates can be either split longitudinally or completely separated during crack propagation. [ 1 ] Conversely, crack propagation at the star‐like morphology is merely bypassed. [ 1 ]…”

Section: Introductionmentioning

confidence: 99%

“…[ 9 ] Therefore, the formation of the α ‐intermetallic or sludge phase can be stated as an empirical equation in relation to the sludge factor (SF) by the initial weight fraction w M of the elements M = Fe, Mn, and Cr. [ 1,2,13,14,18–22 ]

SF = 100 \times (w_{Fe} + {2 w}_{Mn} + {3 w}_{Cr})

…”

Section: Introductionmentioning

confidence: 99%

“…However, the formation of Fe-containing intermetallic phases, which mostly exhibit a plate-like morphology, impairs both the mechanical and casting properties. [1,2] This structural plate-like compound is referred to as the β-Al 4.5 FeSi phase. By increasing initial Fe content in the melt, the plate-like formation is promoted into a coarse lamellar morphology mainly due to diffusion.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Investigation of the Formation of Iron‐Rich Intermetallic Phases in Al–Si Alloys via Thermal Analysis Cooling Curves, Including a Real‐Time Detection for Filtration Process

et al. 2023

Self Cite

View full text Add to dashboard Cite

Iron (Fe) is perceived as an accompanying impurity in aluminum silicon (AlSi) casting alloys. However, the formation of Fe-containing intermetallic phases, which mostly exhibit a plate-like morphology, impairs both the mechanical and casting properties. [1,2] This structural plate-like compound is referred to as the β-Al 4.5 FeSi phase. By increasing initial Fe content in the melt, the plate-like formation is promoted into a coarse lamellar morphology mainly due to diffusion. [3] Consequently, effective feeding with residual melt is hindered, and shrinkage porosity can be enhanced during solidification. [4][5][6] Furthermore, the platelike β-Al 4.5 FeSi morphology leads to stress concentrations at the coarse plate tips, significantly diminishing the casting ductility. [5,7,8] In fatigue crack propagation studies, the crack initiation site has been demonstrated on the plate-like β-morphology, where the plates can be either split longitudinally or completely separated during crack propagation. [1] Conversely, crack propagation at the star-like morphology is merely bypassed. [1]

show abstract

Influence of Internal Defects on the Fatigue Life of Steel and Aluminum Alloys in the VHCF Range

Weidner,

Schmiedel,

Seleznev

et al. 2024

Springer Series in Materials Science

View full text Add to dashboard Cite

This chapter concerns the influence of internal defects (i.e. nonmetallic inclusions, secondary phases and cast defects) on the fatigue lifetime of steel and aluminum alloys in the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regime. The detrimental effect of internal defects depends on multiple factors such as size, morphology, chemical composition, test temperature or position in the material. Specimens were tested after active and/or reactive melt filtration processes of the materials which served to influence the amount and size distribution of internal defects. Fatigue experiments up to 109 cycles were carried out using ultrasonic fatigue testing equipment. In addition, in situ methods, as e.g. full surface view thermography and acoustic emission (AE), were applied to study the processes of crack initiation and propagation, which finally lead to fatigue failure. Furthermore, the cyclically strained samples were subjected to fractographic analysis and the S–N-curves were discussed according to the characteristics of the crack-initiating defects. Based on these investigations, an enhanced knowledge about the correlation of internal defects on the materials’ fatigue strength enables a specific melt filtration strategy adjusted to the materials’ service conditions.

show abstract

Impact of melt conditioning and filtration on iron-rich β phase in AlSi9Cu3 and its fatigue life studied by μCT

Cited by 18 publications

References 57 publications

Removal of Iron from a Secondary Al–Si Die‐Casting Alloy by Metal Melt Filtration in a Laboratory Filtration Apparatus

Removal of Iron from a Secondary Al–Si Die‐Casting Alloy by Metal Melt Filtration in a Laboratory Filtration Apparatus

Investigation of the Formation of Iron‐Rich Intermetallic Phases in Al–Si Alloys via Thermal Analysis Cooling Curves, Including a Real‐Time Detection for Filtration Process

Influence of Internal Defects on the Fatigue Life of Steel and Aluminum Alloys in the VHCF Range

Contact Info

Product

Resources

About