Fatigue life enhancement by irradiation of 12Cr1MoV steel with a Zr+ ion beam. Mesoscale deformation and fracture

Abstract

The structure and properties of 12Cr1MoV steel irradiated with a zirconium ion beam were studied by optical microscopy, scanning electron microscopy, and micro-and nanoindentation. It is shown that the modification covers the entire cross-section of the irradiated specimens to a depth of 1 mm. The data on irradiation-induced structural changes are used to interpret the changes in mechanical properties of the irradiated specimens under static and cyclic loading. Particular attention is given to analysis of strain estimation by the digital image correlation method. 261 262 PANIN et al. PHYSICAL MESOMECHANICS Vol. 18 No. 3 2015 .ig. 1. Schematic of ion beam treatment: 1specimens; 2 ion gun.

Change in the Fine Structure of the Additive Al-Mg Alloy after Electron-Beam Processing

“…In the studies of different energy densities, it revealed that the maximal microhardness value is at the condition of Es= (30-40) J/cm 2 but there is no analysis of the effect of energy density on element distribution [16]. The previous investigations highlighted that the different surface treatments (ion beams, currents and energy densities, et al) refine grain size and improve mechanical properties [17][18][19][20]. At present, there is less report about the investigation of the electron beam treating the Al-Mg specimens manufactured by WAAM.…”