선형회귀분석법을 통한 주조용 A356 합금의 인장특성에 미치는 미세조직적 인자의 영향 = Research Papers : Mechanical Behavior ; Effects of Microstructural Variables on Tensile Behavior of A356 Cast Aluminum Alloy Using Linear Regression Analysis Method

다국어 초록 (Multilingual Abstract)

The effects of microstructural variables, including DAS (dendrite arm spacing), the size of primary a phase, the size of eutectic Si particle and the thickness of eutectic structure, on tensile behavior of A356 cast aluminum alloy were quantitatively identified using linear regression analysis method. For systematic microstructural control in A356 alloy, directional solidification method was used with different solidification rates of 5, 25, 50 and 100 ㎛/s, respectively. The linear regression analysis suggests that both DAS and the size of primary a phase dominantly affect tensile strength of A356 cast aluminum alloy, while tensile ductility is most strongly dependent on the thickness of eutectic structure. The change in tensile behavior with varying microstructural variables in A356 alloy is discussed based on fracto graphic and micrographic observations.