The effect of Cu, Ag, Sm and Sr additions on the statistical distributions of Si particles and tensile properties in A357-T6 alloy castings

被引：20

作者：

Alexopoulos, Nikolaos D. ^{[1
]}

Tiryakioglu, Murat ^{[2
]}

Vasilakos, Apostolos N. ^{[3
]}

Kourkoulis, Stavros K. ^{[4
]}

机构：

[1] Univ Aegean, Dept Financial Engn, Chios 82100, Greece

[2] Univ N Florida, Sch Engn, Jacksonville, FL 32224 USA

[3] Technol Educ Inst Larissa, Dept Mech Engn, Larisa 41110, Greece

[4] Natl Tech Univ Athens, Sch Appl Math & Phys Sci, GR-15773 Athens, Greece

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 604卷

关键词：

Si particles; Weibull analysis; Quality Index; WORK-HARDENING CHARACTERISTICS; MECHANICAL-PROPERTIES; STRUCTURAL INTEGRITY; SILICON PARTICLES; QUALITY INDEX; PRECIPITATION; BEHAVIOR; FRACTURE; CRACKING; DAMAGE;

D O I：

10.1016/j.msea.2014.02.084

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of 1 wt% Cu additions as well as minor alloying additions of Sm, Ag and Sr on the Si particle size and aspect ratio as well as tensile properties was investigated in this study. Results showed that all alloying additions decreased elongation and only Cu addition increased strength slightly whereas others had no adverse effect on yield strength. A correlation between Si particle size and average elongation was found. Sr addition to A357-Cu produced a Weibull mixture in elongation which was interpreted as evidence that this correlation was not due to cause-effect but a third variable affecting both Si particle size and elongation. The Quality Index analysis of tensile data showed that the third variable was most probably the density of bifilms in the melt (melt quality). It is recommended that Quality Index analysis be a part of all new alloy development efforts for cast aluminum alloys. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：40 / 45

页数：6

共 44 条

[1] Relationship between Fracture Toughness and Tensile Properties of A357 Cast Aluminum Alloy [J].

Alexopoulos, N. D. ;

Tiryakioglu, M. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (03) :702-716

[2] A new quality index for characterizing aluminum cast alloys with regard to aircraft structure design requirements [J].

Alexopoulos, ND ;

Pantelakis, SG .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2004, 35A (01) :301-308

[3] ANALYSIS OF THE EFFECTS OF ALLOYING ELEMENTS ON HYDROGEN SOLUBILITY IN LIQUID ALUMINUM-ALLOYS [J].

ANYALEBECHI, PN .

SCRIPTA METALLURGICA ET MATERIALIA, 1995, 33 (08) :1209-1216

[4] Damage by the cracking of silicon particles in an Al-7Si-0.4Mg casting alloy [J].

Caceres, CH ;

Griffiths, JR .

ACTA MATERIALIA, 1996, 44 (01) :25-33

[5] The effect of Cu content on the level of microporosity in Al-Si-Cu-Mg casting alloys [J].

Cáceres, CH ;

Djurdjevic, MB ;

Stockwell, TJ ;

Sokolowski, JH .

SCRIPTA MATERIALIA, 1999, 40 (05) :631-637

[6] Microstructural effects on the strength-ductility relationship of Al-7Si-Mg casting alloys [J].

Cáceres, CH .

ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PTS 1-3, 2000, 331-3 :223-228

[7] Entrainment defects [J].

Campbell, J .

MATERIALS SCIENCE AND TECHNOLOGY, 2006, 22 (02) :127-145

[8] Review of effect of P and Sr on modification and porosity development in Al-Si alloys [J].

Campbell, J. ;

Tiryakioglu, M. .

MATERIALS SCIENCE AND TECHNOLOGY, 2010, 26 (03) :262-268

[9] An overview of the effects of bifilms on the structure and properties of cast alloys [J].

Campbell, John .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2006, 37 (06) :857-863

[10] Phase relations and precipitation in Al-Mg-Si alloys with Cu additions [J].

Chakrabarti, DJ ;

Laughlin, DE .

PROGRESS IN MATERIALS SCIENCE, 2004, 49 (3-4) :389-410

← 1 2 3 4 5 →