For the working places where have the risk of burningexplosion, non-sparking tools are important safety tools. They are made of hardest Cu-Be alloys. However, Be is very expensivepoisonous. To overcome this, we develop Be-free copper alloys which have high hardness for tools. In Taiwan, we have steel-tools industry. To have higher profit, it is promising to produce such Be-free non-sparking tools.

Novel alloys are composed of five special technologies (1)Development of CALPHAD phase diagram for medium entropy alloys(2)Development of novel lightweight Ti-rich medium entropy alloys with high strengthhigh ductility (YS 950 MPa, TS 1200 MPaEL 30)(3)Heterogeneous structures obtained by the thermomechanical treatment an rapid annealing treatment(4)Tailoring the heterogeneous structures to enhance the mechanical properties (YS 1240 MPa, TS 1510 MPa, 250 MPa·cm3/ga nd EL 25)(5)Commercial productions are produced by these large dimension alloys for further industrial application.

High entropy materials were proposed and developed by Professor Jien-Wei Yeh in 1995. He named, defined, and elucidated “High-Entropy Alloys,” as well as established High-Entropy Materials Center to develop critical materials for smart machine, green technology, biomedical technology, and national defense. Alloys with high strength, corrosion resistance, and anti-bacterial capability are also developed for manufacturing knives, door handles, handrails, etc. to prevent infection during the post-epidemic era.