2014
DOI: 10.1016/j.jmst.2013.09.001
|View full text |Cite
|
Sign up to set email alerts
|

Role of Double Oxide Film Defects in the Formation of Gas Porosity in Commercial Purity and Sr-containing Al Alloys

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
19
0

Year Published

2017
2017
2022
2022

Publication Types

Select...
7
1

Relationship

0
8

Authors

Journals

citations
Cited by 33 publications
(20 citation statements)
references
References 17 publications
0
19
0
Order By: Relevance
“…Nateghian [24] suggested that, with the addition of 0.05 wt pct Sr to commercial purity aluminum, the Al 2 O 3 layer started to transform into SrO. Farhoodi et al [25] suggested that such a transformation might make a bifilm defect stronger which would produce less rupture points and thus the entrapped atmosphere was less likely to be consumed. In this case, a bifilm defect should last longer in an aluminum melt containing Sr (and contribute to increased porosity in the aluminum castings).…”
Section: Introductionmentioning
confidence: 99%
“…Nateghian [24] suggested that, with the addition of 0.05 wt pct Sr to commercial purity aluminum, the Al 2 O 3 layer started to transform into SrO. Farhoodi et al [25] suggested that such a transformation might make a bifilm defect stronger which would produce less rupture points and thus the entrapped atmosphere was less likely to be consumed. In this case, a bifilm defect should last longer in an aluminum melt containing Sr (and contribute to increased porosity in the aluminum castings).…”
Section: Introductionmentioning
confidence: 99%
“…The increase in the Al 4 Sr volume fraction increases the overall porosity area of the gas pores from 6.2% to 9.6%, compared with the sample without Sr. This porosity decreases both the yield and ultimate tensile strength values of the produced samples, as Tekman et al have reported [28,29]. Porosity parameters, namely, the total porosity area is analyzed using Pixcavator IA 4.3 software (Marshall University, Huntington, WV, USA).…”
Section: Resultsmentioning
confidence: 99%
“…Another possible explanation for the formation of the hollow area is the flotation of real double oxide film defects that were present in the lower bar, which expanded due to the diffusion of hydrogen into their atmospheres, [16][17][18] to be accumulated underneath the oxide layer at the top of the lower bar (named 'oxide layer 1' in Fig. 1).…”
Section: Discussionmentioning
confidence: 99%
“…1). The rate of flotation of oxide layers is known [16][17][18] to depend on the hydrogen content of the melt, which in turn depends on the rate of reaction of the melt with ambient moisture. As the Mg content of the melt increased, this reaction rate increased; 19 therefore, the hydrogen content of the melt and the rate of the flotation of the oxide films, and hence the possibility of the formation of the hollow area underneath the oxide layer, increased.…”
Section: Discussionmentioning
confidence: 99%