hardness microstructure 27 mechanical properties 26 History of engineering & technology 16 Technology: general issues 14 magnesium 9 wear 9 corrosion 8 titanium 8 fracture 7 heat treatment 7 surface roughness 7 temperature 7 tensile properties 7 tensile strength 7 additive manufacturing 6 adhesion 6 fatigue 6 microstructures 6 nanoindentation 6 roughness 6 wear resistance 6 aluminum 5 composite 5 copper 5 magnesium alloy 5 morphology 5 phase transformation 5 simulation 5 spark plasma sintering 5