Creep damage in small punch creep specimens of Type 304 stainless steel

Experimental and Numerical Analysis of Initial Plasticity in P91 Steel Small Punch Creep Samples

“…The results of the FE calculations show that the peak damage location is, in both cases, near the bottom surface of the specimen and in line with the contact edge between the punch and the specimen (agreeing with previous observations from the literature [3,43]). The region where peak damage is located, defined in the literature as the most critical location of the specimen [16,28], exhibits a global creep enhancement.…”

“…In view of these requirements, the CAX4RH element type, available in ABAQUS, was used. The elements are refined near the edge of the unsupported region of the specimen, where significant bending deformation take place, and in the region close to the contact edge between the punch and the specimen, which was identified as the most critical location in the specimen [16,28,43].…”

A study on the evolution of the contact angle of small punch creep test of ductile materials

“…simply supported constrains, are adopted instead of modelling the holder and the support [26][27][28]. In particular Dymáček et al show that if the punch load is less than 400 N and the upper and lower dies are not allowed to deform during the test, the time to rupture obtained by the FE analyses is closer to the experimental time to failure [26].…”

Effect of geometric factors and processing parameters on plastic damage of SUS304 stainless steel by small punch test

“…Our results show that void volume fraction at the center of specimen are obviously higher than those near to edge at the same time, and the initial crack for stress concentration is away from center with the increment of friction coefficient while it was 0.1, 0.3, and 0.4, respectively. The reason is due to the local thickness reduction which suggests that the damage is an inhomogeneous process for degradation of material properties [13,26]. Compared with Fig.…”

“…Detailed simulation about void growth, coalescence and the promotion of secondary microvoids in deformation were performed in early investigation in order to get a precise forecast of fracture, finite element model was expected to be used in rupture [12]. Ling et al [13] evaluated the creep damage in the small punch test by finite element method and proved the potential of small punch test to describe damage properties. However, the plastic damage assessment of metal using small punch test is still in its infancy.…”