Metallic 4D Printing of Laser Stimulation. Issue 12 (22nd January 2023)

• Record Type: Journal Article
• Authors: Wu, Wenzheng; Zhou, Yiming; Liu, Qingping; Ren, Luquan; Chen, Fan; Fuh, Jerry Ying Hsi; Zheng, Aodu; Li, Xuechao; Zhao, Ji; Li, Guiwei
• Is Part Of: Advanced science. Volume 10:Issue 12(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-01-22
• Subjects: 4D printing -- additive manufacturing -- laser powder bed fusion -- laser stimulation -- metallic shape‐morphing structures; Science -- Periodicals; 505
• DOI: 10.1002/advs.202206486
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: 4D printing of metallic shape‐morphing systems can be applied in many fields, including aerospace, smart manufacturing, naval equipment, and biomedical engineering. The existing forming materials for metallic 4D printing are still very limited except shape memory alloys. Herein, a 4D printing method to endow non‐shape‐memory metallic materials with active properties is presented, which could overcome the shape‐forming limitation of traditional material processing technologies. The thermal stress spatial control of 316L stainless steel forming parts is achieved by programming the processing parameters during a laser powder bed fusion (LPBF) process. The printed parts can realize the shape changing of selected areas during or after forming process owing to stress release generated. It is demonstrated that complex metallic shape‐morphing structures can be manufactured by this method. The principles of printing parameters programmed and thermal stress pre‐set are also applicable to other thermoforming materials and additive manufacturing processes, which can expand not only the materials used for 4D printing but also the applications of 4D printing technologies. Abstract : A 4D printing method to endow non‐shape‐memory metal materials with programmable shape‐morphing behaviors via pre‐stress assemblies enabled by laser powder bed fusion is reported. The printed parts can realize the shape changing of selected areas during or after forming process owing to stress release generated. The methodology opens new avenues to create metallic shape‐morphing 3D structures for high‐performance engineering applications.