1. Department of Mechanical Properties Institute of Physics of Materials Academy of Sciences of the Czech Republic Brno 61662 Czech Republic
2. Technology Department Nagano Forging Co. Nagano 381-0003 Japan
3. Department of Materials Science and Engineering Faculty of Engineering Kyushu University Fukuoka 819-0395 Japan
4. WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER) Kyushu University Fukuoka 819-0395 Japan
5. UJP PRAHA a.s. Praha- Zbraslav 15610 Czech Republic