Precipitation of Sr-rich intermetallic particles and their influence on pore formation in Sr-modified A356 alloy

Miresmaeili, S.M.; Campbell, John B.; Shabestari, S.G.; Boutorabi, S. M. A.

doi:10.1007/s11661-005-0106-3

Cited by 40 publications

(22 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 ' 67 Modifiers can, however, also increase inclusion content in the melt through the formation of Sr oxides, as well as decrease the surface tension, and increase the freezing range of the alloys. 68 ' 69 Consequently, the addition of Sr is frequently associated with an increase in the amount of porosity.…”

Section: Modificationmentioning

confidence: 99%

Effects of metallurgical parameters on the decomposition of л-AlFeMgSi phase in AL-SI-MG alloys and its influence on the mechanical properties /

Elsharkawi¹

2011

View full text Add to dashboard Cite

show abstract

Section: Modificationmentioning

confidence: 99%

Effects of metallurgical parameters on the decomposition of л-AlFeMgSi phase in AL-SI-MG alloys and its influence on the mechanical properties /

Elsharkawi¹

2011

View full text Add to dashboard Cite

show abstract

“…These intermetallic compounds might be nucleated on a bifilm defect. Miresmaeili [26] calculated the lattice mismatch between MgAl 2 O 4 spinel and Al 2 Si 2 Sr to be 4.26 pct, and suggested that spinel could be a favored nucleation site for the growth of intermetallic compounds.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Sr Modifier Additions on Double Oxide Film Defects in 2L99 Alloy Castings

Chen

Griffiths

2017

Metall Mater Trans A

View full text Add to dashboard Cite

In this paper, Sr modifier (300 ppm) was added to 2L99 alloy sand castings to investigate its effect on bifilm defects in the castings. Two different sand molds were used in this study, with good and bad running system designs, to introduce different amounts of bifilm defects into the castings. The mechanical properties of the modified 2L99 castings were compared to the properties of unmodified castings and showed that with high bifilm defect contents (H) the Sr addition reduced the Weibull modulus of the UTS by 67 pct and the Position Parameter by 5 pct, and introduced a bimodal distribution into the Weibull plot of the pct Elongation. However, for castings with low bifilm defect content (L), the Weibull moduli of both the UTS and pct Elongation were significantly improved (by 78 and 73 pct, respectively) with the addition of Sr. The Position Parameter of the pct Elongation was improved by 135 pct. The results suggested that a desirable modification effect can only be achieved while the bifilm defect content in a casting was low.

show abstract

“…Furthermore, the issue of the dynamical interaction between melt and the soft oxide layer that encases the solidifying sample should deserve specific attention. This is, of course, a recurrent, open question in aluminium alloy casting [21,22].…”

Section: Discussionmentioning

confidence: 99%

Observation of the initiation and propagation of solidification cracks by means ofin situsynchrotron X-ray radiography

Aveson¹,

Reinhart²,

Billia³

et al. 2012

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

A 3D coupled hydro-mechanical granular model for the prediction of hot tearing formation M Sistaninia, A B Phillion, J -M Drezet et al.Investigation of gravity effects on solidification of binary alloys with in situ Xray radiography on earth and in microgravity environment H Nguyen-Thi, A Bogno, G Reinhart et al. Abstract. We report on the in situ, time resolved, observation of solidification cracking in a thin sample of an Al-15wt%Sn alloy at ESRF BM05. During the experiment, solidification cracking was seen to occur during natural cooling of the sample at a solid fraction of ∼95%, between directionally agglomerated dendritic networks. Through detailed analysis, three stages of crack growth were observed: crack initiation, which typically occurs asymmetrically with the liquid film separating from one side of the dendritic network prior to full detachment; crack propagation, where the liquid film generally detaches from both sides simultaneously; and crack coalescence. We correlate our observations using scanning electron microscopy, which shows that voids between grains, and also spikes, can appear asymmetrically on either side of the crack surface.

show abstract

Precipitation of Sr-rich intermetallic particles and their influence on pore formation in Sr-modified A356 alloy

Cited by 40 publications

References 22 publications

Effects of metallurgical parameters on the decomposition of л-AlFeMgSi phase in AL-SI-MG alloys and its influence on the mechanical properties /

Effects of metallurgical parameters on the decomposition of л-AlFeMgSi phase in AL-SI-MG alloys and its influence on the mechanical properties /

The Effect of Sr Modifier Additions on Double Oxide Film Defects in 2L99 Alloy Castings

Observation of the initiation and propagation of solidification cracks by means ofin situsynchrotron X-ray radiography

Contact Info

Product

Resources

About