Biography
Yiyi Li, Chinese metallurgist (Suzhou, Jiangsu Province 20 October 1933 –
Authored over 150 scientific publications
ACHIEVEMENTS
Important contributions in the diffusion and penetration behavior of hydrogen in metals, transformation of alloys under cryogenic and micro-gravity conditions
Designed the Fe-Mn-Al system phase diagram and the phase appraisal method
First to have experimentally observed the pole mechanism of stacking fault superimposition during martensitic nucleation and growth
Discovered that antiferromagnetic transformation exists in low temperature and in Fe-Mn alloy
Measured the comprehensive mechanical and physical properties of cryogenic steels between 42 K and 300 K
First to propose a technical route for high-pressure hydrogen charging in a hot gaseous environment
DEVELOPED
5 kinds of intensity level hydrogen resistance steel
9 series of steels
Novel materials (e.g. steels) for specific functions
High strength nonmagnetic stainless steels for use at ultra-low temperature on the superconducting magnet of controlled fusion reactors
PATENTS
115
