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The present study aims at investigating the effects of eutectic Si particles on mechanical properties

and fracture toughness of three A356 aluminum alloys. These A356 alloys were fabricated by casting processes

such as rheo-casting, squeeze-casting, and casting-forging, and their mechanical properties and fracture

toughness were analyzed in relation with microfracture mechanism study. All the cast A356 alloys contained

eutectic Si particles mainly segregated along solidification cells, and the distribution of Si particles was

modified by squeeze-casting and casting-forging processes. Microfracture observation results showed that

eutectic Si particles segregated along cells were cracked first, but that aluminum matrix played a role in

blocking crack propagation. Tensile properties and fracture toughness of the squeeze cast and cast-forged

alloys having homogeneous distribution of eutectic Si particles were superior to those of the rheo-cast alloy.

In particular, the cast-forged alloy had excellent hardness, strength, ductility, and fracture toughness because

of the matrix strengthening and homogeneous distribution of eutectic Si particles due to forging process.

The present study aims at investigating the effects of eutectic Si particles on mechanical properties

and fracture toughness of three A356 aluminum alloys. These A356 alloys were fabricated by casting processes

such as rheo-casting, squeeze-casting, and casting-forging, and their mechanical properties and fracture

toughness were analyzed in relation with microfracture mechanism study. All the cast A356 alloys contained

eutectic Si particles mainly segregated along solidification cells, and the distribution of Si particles was

modified by squeeze-casting and casting-forging processes. Microfracture observation results showed that

eutectic Si particles segregated along cells were cracked first, but that aluminum matrix played a role in

blocking crack propagation. Tensile properties and fracture toughness of the squeeze cast and cast-forged

alloys having homogeneous distribution of eutectic Si particles were superior to those of the rheo-cast alloy.

In particular, the cast-forged alloy had excellent hardness, strength, ductility, and fracture toughness because

of the matrix strengthening and homogeneous distribution of eutectic Si particles due to forging process.

권호기사

권호기사 목록 테이블로 기사명, 저자명, 페이지, 원문, 기사목차 순으로 되어있습니다.
기사명 저자명 페이지 원문 목차
11Cr 페라이트강의 열화특성에 미치는 제어압연의 영향 송상민 ;홍석우 ;배득승 ;정우상 ;정순효 ;권숙인 pp.1-5

페라이트계 스테인리스강의 열간압연 시 발생하는 sticking 현상 연구 손창영 ;김창규 ;하대진 ;이성학 ;이종석 ;김광태 ;이용득 pp.6-17

주조 A356 알루미늄 합금의 기계적 성질과 파괴인성에 미치는 공정 Si 입자의 영향 이규홍 ;권용남 ;이성학 pp.18-29

Ti₃AlC₂ 층상화합물의 대기중 900-1,200℃에서의 산화특성 T. D. Nguyen ;한재호 ;박상환 ;이동복 pp.30-35

신라왕경 출토 청동유물의 미세조직과 성분분석 및 그 시대의 제작기술 추정 정영동 ;정원섭 pp.36-43

고분자전해질 연료전지 분리판용 316 스테인리스강의 전기전도도에 미치는 Nb, Ti 첨가 및 표면처리 효과 이석현 ;김정헌 ;김민철 ;천동현 ;위당문 pp.44-50

OLED 디스플레이를 위한 2,5-다이아이오도티오페인의 초기박막 형성에 관한 연구 류근걸 ;이윤배 ;김성한 pp.51-54

ReSi_1.75_ 단결정의 열전특성에 미치는 Ge 첨가효과 오민욱 ;H. Inui ;오명훈 ;김봉서 ;박수동 ;이희웅 ;위당문 pp.55-60

밀폐유도용해로 제조된 CoSb_3-y_Sn_y_의 열전특성 박관호 ;정해일 ;어순철 ;김일호 pp.61-64

참고문헌 (21건) : 자료제공( 네이버학술정보 )

참고문헌 목록에 대한 테이블로 번호, 참고문헌, 국회도서관 소장유무로 구성되어 있습니다.
번호 참고문헌 국회도서관 소장유무
1 Matter-affected neutrino oscillations in ordinary and mirror stars and their implications for gamma-ray bursts 네이버 미소장
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8 JH Hong, Mater.Sci. Eng., 379, 17 (2004). 미소장
9 Intermetallics, 12,43 (2004). 미소장
10 Metal-Insulator Transition in the Amorphous CexSi100-x (4≤ x≤ 83) Heavy Fermion System 네이버 미소장
11 Mater Sci, Eng., 332,81 (2002). 미소장
12 AppL Surf. Sci” 241,68 (2005). 미소장
13 ASTM Standard Test Method for Plane-Strain FractureToughness of Metallic Materials,ASTM E399-90,ASTM,Philadelphia,PA (1995), 미소장
14 J Kok Inst Met, & Mater., 33,677 (1995). 미소장
15 Mater. Sci. Eng., 25103(1976). 미소장
16 Proc. 4th Int. Conf. on Semi-Solid Processing of Alloys and Composites, p.76,(1996). 미소장
17 J. Kor. Inst Met & Mater.,41,750 (2003). 미소장
18 J. Mater Process. TechnoL,40,73 (1994). 미소장
19 Scripta Mater,54,41 (2006). 미소장
20 Scripta Metall. 20, 43 (1986). 미소장
21 J. Mater. Process. Technol, 140,391 (2003). 미소장