氢促进局部塑性变形理论的发展趋势

张倩茹, 孙擎擎

Hydrogen Enhanced Localized Plasticity: A Critical Review

ZHANG Qianru, SUN Qingqing

图6 纯镍中氢对位错集群行为的影响研究(应变为16.0%)[57]

Fig.6 Dislocation structures of differently orientated bulk grains in pure Ni without and with 400 ppm hydrogen after deformed to a strain of 16.0%. The 400 ppm H-charged Ni fractured at 16.0%[57]: (a1) [100], (a2) [110] and (a3) [111] corner grains of uncharged sample, (b1) [100], (b2) [110] and (b3) [111] corner grains of 0.0004% (atomic fraction) H-charged sample. The black circles in the IPFs correspond to the grain orientation along the tensile direction of the site of interest. Note that the diffraction pattern corresponds to the largest cellular area in the TEM foil, (c) Cell/IDB size statistics of the uncharged Ni and 0.0004% (atomic fraction) H-charged Ni at different strain levels