Changes in Structural Characteristics of Hypoeutectic Al-Si Cast Alloy after Age Hardening

被引：15

作者：

Hurtalova, Lenka ^{[1
]}

Belan, Juraj ^{[1
]}

Tillova, Eva ^{[1
]}

Chalupova, Maria ^{[1
]}

机构：

[1] Univ Zilina, Dept Mat Engn, Zilina 01026, Slovakia

来源：

MATERIALS SCIENCE-MEDZIAGOTYRA | 2012年 / 18卷 / 03期

关键词：

Al-Si-Cu cast alloys; solution treatment; age-hardening; Cu-rich phase; MECHANICAL-PROPERTIES; INTERMETALLIC PHASES; IRON;

D O I：

10.5755/j01.ms.18.3.2430

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The contribution describes influence of the age-hardening consist of solution treatment at 515 degrees C with holding time 4 hours, water quenching at 40 degrees C and artificial aging at different temperature 150 degrees C, 170 degrees C and 190 degrees C with different holding time 2, 4, 8, 16 and 32 hours on mechanical properties (tensile strength and Brinell hardness) and changes in morphology of eutectic Si, Fe-rich and Cu-rich intermetallic phases in secondary (recycled) AlSi9Cu3 cast alloy. A combination of different analytical techniques (light microscopy upon black-white and colour etching, scanning electron microscopy (SEM) upon deep etching and energy dispersive X-ray analysis (EDX)) were therefore been used for the identification of the various phases. Quantitative study of changes in morphology of eutectic Si, Cu-rich and Fe-rich phases was carried out using Image Analyzer software NIS-Elements. Mechanical properties were measured in line with EN ISO. Age-hardening led to changes in microstructure include the spheroidization and coarsening of eutectic silicon, gradual disintegration, shortening and thinning of Fe- rich intermetallic phases, the dissolution of precipitates and the precipitation of finer hardening phase (Al2Cu) further increase in the hardness and tensile strength in the alloy.

引用

页码：228 / 233

页数：6

共 21 条

[1]

Bolibruchova D., 2005, AL SI ALLOY CASTINGS

[2] The solidification characteristics of Fe-rich intermetallics in Al-11.5Si-0.4Mg cast alloys [J].

Cao, X ;

Campbell, J .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2004, 35A (05) :1425-1435

[3] Designing aluminum alloys for a recycling friendly world [J].

Das, Subodh K. .

ALUMINIUM ALLOYS 2006, PTS 1 AND 2: RESEARCH THROUGH INNOVATION AND TECHNOLOGY, 2006, 519-521 :1239-1244

[4]

Dobrzaski LA., 2006, Journal of Achievements in Materials and Manufacturing Engineering, V18, P211

[5] Doe applied to microstructural and mechanical properties of Al-Si-Cu-Mg casting alloys for automotive applications [J].

Grosselle, Fabio ;

Timelli, Giulio ;

Bonollo, Franco .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (15) :3536-3545

[6]

Hurtalova L., 2009, MAT ENG A, V3a, P110

[7] Iron-rich intermetallic phases and their role in casting defect formation in hypoeutectic Al-Si alloys [J].

Lu, L ;

Dahle, AK .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (3A) :819-835

[8] Effect of iron content on the formation of β-Al5FeSi and porosity in Al-Si eutectic alloys [J].

Moustafa, M. A. .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2009, 209 (01) :605-610

[9] RELATION BETWEEN MECHANICAL PROPERTIES AND MICROSTRUCTURE OF CAST ALUMINUM ALLOY AlSi9Cu3 [J].

Panuskova, M. ;

Tillova, E. ;

Chalupova, M. .

STRENGTH OF MATERIALS, 2008, 40 (01) :98-101

[10]

Paray F., 1994, MICROSTRUCTURE CAST, V7, P29

← 1 2 3 →