Characterization of the Effect of Melt Treatments on Melt Quality in Al-7wt %Si-Mg Alloys

被引：33

作者：

Uludag, Muhammet ^{[1
]}

Cetin, Remzi ^{[2
]}

Dispinar, Derya ^{[3
]}

Tiryakioglu, Murat ^{[4
]}

机构：

[1] Bursa Tech Univ, Dept Met & Mat Engn, Fac Nat Sci Architecture & Engn, Bursa, Turkey

[2] Halic Univ, Fac Engn, Istanbul, Turkey

[3] Istanbul Univ, Fac Engn, Istanbul, Turkey

[4] Univ North Florida, Sch Engn, Jacksonville, FL 32224 USA

来源：

METALS | 2017年 / 7卷 / 05期

关键词：

A356; alloy; degassing; grain refinement; modification; pore size; OXIDE-FILM DEFECTS; POROSITY FORMATION; ALUMINUM-ALLOY; TENSILE PROPERTIES; GRAIN REFINER; A356; ALLOY; MECHANICAL-PROPERTIES; METAL QUALITY; GAS POROSITY; AL;

D O I：

10.3390/met7050157

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of degassing, holding time and melt additions (Sr, Sr + Ti, Ti, B and B + Sr) on the quality of A356 melts were examined. A total of 120 reduced pressure test samples were collected. Pores in these samples were analyzed via digital image processing to determine the number density of pores as well as the statistical distribution of their sizes. Results showed that in all cases, degassing with argon reduced the number of defects regardless of the additions made to the melts. Moreover, all additions were found to degrade melt quality. The lowest number density of pores in all melts was achieved in melts with no additions that were degassed. In both degassed and non-degassed melts, Sr additions degraded the melt quality significantly. The mechanisms of melt quality improvement or degradation with different melt treatments are discussed in the paper.

引用

页数：16

共 60 条

[1] A COMPARATIVE STUDY OF POROSITY AND PORE MORPHOLOGY IN A DIRECTIONALLY SOLIDIFIED A356 ALLOY [J].

Akhtar, S. ;

Arnberg, L. ;

Di Sabatino, M. ;

Dispinar, D. ;

Syvertsen, M. .

INTERNATIONAL JOURNAL OF METALCASTING, 2009, 3 (01) :39-52

[2] Effect of hydrogen content, melt cleanliness and solidification conditions on tensile properties of A356 alloy [J].

Akhtar, S. ;

Dispinar, D. ;

Arnberg, L. ;

Di Sabatino, M. .

INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, 2009, 22 (1-4) :22-25

[3] A TEST OF GOODNESS OF FIT [J].

ANDERSON, TW ;

DARLING, DA .

JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION, 1954, 49 (268) :765-769

[4]

[Anonymous], 1956, AFS T

[5] The quantitative discrimination between shrinkage and gas microporosity in cast aluminum alloys using spatial data analysis [J].

Anson, JP ;

Gruzleski, JE .

MATERIALS CHARACTERIZATION, 1999, 43 (05) :319-335

[6] Hydrogen-induced gas porosity formation in Al-4.5 wt% Cu-1.4 wt% Mg alloy [J].

Anyalebechi, Prince N. .

JOURNAL OF MATERIALS SCIENCE, 2013, 48 (15) :5342-5353

[7]

Argo D., 1988, AFS T, V96, P65

[8]

ARNBERG L, 1982, MET TECHNOL, V9, P1

[9]

Brandt F., 1953, AFS T, V61, P451

[10] The effects of strontium and grain refiner additions on the fatigue and tensile properties of industrial Al-Si-Cu-Mg alloy castings produced using the Ford Motor Company - Cosworth precision sand process [J].

Byczynski, GE ;

Cusinato, DA .

INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, 2002, 14 (05) :315-324

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