Composition design, microstructure, and mechanical properties of novel Ti–Co–Ni–Zr complex concentrated alloys

The composition design of complex concentrated alloys originates from the composition design of amorphous alloys. To expand the composition design of alloys, herein, the compositions of novel Ti–Co–Ni–Zr complex concentrated alloys were obtained by the proportional mixing of Ti2Co intermetallics and Ni64Zr36 binary eutectic. The theory and method of this new alloy design are also discussed. The as-cast Ti28Co14Ni37.12Zr20.88, Ti30Co15Ni35.2Zr19.8, and Ti32 . Co16Ni33.3Zr18.7 alloys were composed of body-centered cubic TiNi and Ti2Ni phases. The Ti28Co14Ni37.12Zr20.88 alloy exhibited high yield strength (2 164 MPa) and compressive strength (2 539 MPa) under quasi-static compression at roomtemperature. The high strength of Ti28Co14Ni37.12Zr20.88 alloy is related to the precipitation of Ti2Ni along the grain boundary and the precipitation in the crystal. This paper validates that using the proportional mixing method of intermetallics and eutectic alloy is an effective method to design complex concentrated alloys with high strength.

The art reconstruction of waste ribbons based on encouraging people to overcome coronavirus disease 2019

To achieve efficient and environmental reuse of waste ribbons, artworks reconstructed from waste ribbons for decorative occasions were inspired by the dedicated and determined people working against coronavirus disease 2019 (COVID-19) and developed through a handmade and delicate strategy. With the theme of ‘Ordinary * Extraordinary,’ the artworks aim to convey endless positive energy and hope to people suffering from COVID-19. To fulfill the art reconstruction, the design idea, composition design and color design were comprehensively considered and carefully described. The artworks were applied for decoration in hospital wards and the home environment. Their composition and color gave medical workers, patients and ordinary people suffering from COVID-19 a sense of comfort and warmth. All positive energy from our artworks accompanied people and encouraged them never to give up and overcome COVID-19. The art reconstruction of waste ribbons proposed in this study may provide an excellent way for the reuse of waste ribbons. More importantly, it improves the added value of products and strengthens people's determination to overcome COVID-19.