Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 256, Issue -, Pages 69-77Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2018.01.030
Keywords
Selective laser melting; Aluminum alloy; Morphology; Microstructure; Processing window; Hardness
Funding
- National Natural Science Foundation of China [61475056]
- Fundamental Research Funds for the Central Universities [HUST: 2016XYZD005]
- National Program on Key Basic Research Project of China (973 Program) [613281]
- Shanghai Aerospace Science & Technology Innovation Fund [SAST2016044]
Ask authors/readers for more resources
The ever-increasing demands for lightweight alloys parts with complex shapes In the aerospace industries lead the development of selective laser melting (SLM) technology. The effect of changing scanning speed on the formation of single track, as well as the overlapping rate to form multi tracks during SLM processed (SLMed) Al-Cu-Mg alloy was investigated. A processing map for SLMed single track of Al-Cu-Mg alloys was developed. Under different processing parameters, the single track can be characterized as unstable, stable with cracks and stable without cracks. For geometrical characteristic of melt pool of single track, the width and remelted depth are positively correlated with energy input, whereas the height and the contact angle are to the contrary. As for multi tracks, four typical morphologies have been identified, and a processing map was established to select the optimum processing parameters for the SLMed parts without defects. Finally, high density cubic samples (99.91%) without imperfections and microcracks were obtained using optimum processing parameters. In addition, the relationship between microstructure and hardness was discussed. The results provide an important experimental guidance for obtaining high-strength Al-Cu-Mg alloys dense parts with good performance.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available