History of engineering and technology 36 Technology: general issues 33 Hardening 11 Strain hardening 11 History of engineering & technology 10 Compressive strength 4 Materials science 4 Plasticity 4 Research & information: general 4 Research and information: general 4 Additives 3 Carbides 3 Elastic moduli 3 Hardened concrete 3 Hot rolling 3 Kinematics 3 Microstructure 3 Nanostructured materials 3 Nickel alloys 3 Physics 3 Titanium alloys 3 Analysis method 2 Binary alloys 2 Chromium alloys 2 Concretes 2 Constitutive law 2 Crystal orientation 2 Cyclic loads 2 Ductile fracture 2 Ductility 2