Grain boundaries 25 Technology: general issues 18 Grain-boundaries 9 History of engineering and technology 8 Research & information: general 8 TJ Mechanical engineering and machinery 7 Grain size and shape 5 Aluminum alloys 4 Binary alloys 4 Domain walls 4 Mechanical engineering & materials 4 Mechanical properties 4 Morphology 4 Physics 4 Textures 4 Additive manufacturing 3 Chemistry 3 Grain refinement 3 Hardness 3 History of engineering & technology 3 Magnetic domains 3 Mechanical alloying 3 Microstructure 3 Ternary alloys 3 microstructure 3 Aircraft engines 2 Barium compounds 2 Carbides 2 CdSe 2 Chromium alloys 2