Fundamental Study on the Development of Pure Magnesium Parts by Additive Manufacturing: An Experimental and Computational Analysis

Bandar AlMangour; Jinquan Cheng; Dariusz Grzesiak; Yu‑Jin Hwang; Kee‑Ahn Lee

doi:10.1007/s12540-022-01300-x

추천

검색

자료유형: 학술저널

저자정보: Bandar AlMangour (King Fahd University of Petroleum & Minerals) Jinquan Cheng (Composite Solutions and Digital Manufacturing LLC) Dariusz Grzesiak (West Pomeranian University of Technology) Yu‑Jin Hwang (Inha University) Kee‑Ahn Lee (Inha University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.2

발행연도: 2023.2

수록면: 429 - 443 (15page)

DOI: 10.1007/s12540-022-01300-x

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

The low density and high biocompatibility of Mg-based materials make them suitable for lightweight structural and biomedicalapplications. In this study, we explored the use of selective laser melting (SLM)–an additive manufacturing processwherein metal powders are consolidated in a layer-by-layer manner, allowing the fabrication of complex components. SLMtypically involves complex physicochemical phenomena and results in laser-processing defects, which makes it difficult topredict the densification mechanisms of the melt pool. Therefore, a full-scale model was developed to investigate the thermalbehavior of the melt pool (e.g., temperature gradient distribution, melt pool dimensions, and cooling rate) and the resultantdensification activity under various laser energy density (η) values. In parallel, experimental investigations of the densificationbehavior and microstructural evolution were undertaken with the same SLM processing parameters. The challengesassociated with the SLM processability of Mg were comprehensively addressed. Both the peak temperature gradients withinthe molten pool and molten pool dimensions increased with increasing η, and an opposite trend was observed for the coolingrate. A low η (i.e., high scanning speed) results in a low operating temperature and short liquid lifetime, which in turn leadto poor wettability and many pore-chain and balling defects. However, high η values generated melt pool instability, whichresulted in extensive evaporation, cracks, and porosity. The SLM-processed samples had fine twin-like microstructures asa result of rapid solidification. The experimental and simulation results agreed well, validating the thermal behavior of themolten pool and underlying physical mechanism.

#Selective laser melting (SLM) · Magnesium · Porosity · Microstructure · Simulation

참고문헌 (0)

참고문헌 신청

참고문헌이 DBpia에서 서비스 중이라면, [참고문헌 신청]을 통해 등록해보세요

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!