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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.4
- 수록면
- 1,015 - 1,027 (13page)
- DOI
- 10.1007/s12540-023-01553-0
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초록· 키워드
오류제보하기
Uniform grain morphology and low porosity are the key to obtain better mechanical properties of 2319 aluminum alloyfabricated by wire arc additive manufacture. In this study, the influence of heat flow on the grain morphology and porositywas investigated by experimental and simulation methods. The solidification theory was used to illustrate the columnarto-equiaxed transition phenomenon and the variation in the volume fractions of different grains. The results show that thedeposition layer was composed of fine equiaxed grains in the inter-layer zone, columnar and equiaxed grains in the lowerand upper parts the of inner-layer zone, respectively. Furthermore, the volume fractions of the equiaxed and columnar grainswere varied by adjusting wire feed rates (WFR). With the higher WFR, the volume fraction of columnar grains decreases,while the porosity and tensile strength first increase and then decrease. The best mechanical properties could be achievedwhen the WFR was 5.5 m/min, with a tensile strength of 274 MPa and an elongation of 12.5%.
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