Toughness losses in low alloy steels at high temperatures: an appraisal of certain factors concerning the small punch test

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

“…Development of the method has been driven by the need to measure in-service degradation of mechanical properties with a limited volume of available material [2]. In the past decade, the small punch test has been used successfully to characterize the mechanical strength, impact toughness, and fracture properties of materials with specimens measuring only 0.5 mm in thickness by Bulloch [3][4][5], Dobes [6][7][8], Baek et al [9], Fleury [10,11], Ule [12], and Komazai et al [13], Yang and Wang [14] presented a numerical model in which the primary and the secondary creep stages were calculated but creep damage was not considered.…”

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

“…However, there are many defects in the traditional nondestructive testing techniques. Therefore, the small punch test (SPT), a new miniature specimen testing technique, possessing the merits of two methods mentioned above, has attracted an increasing attention of many researchers [1][2][3][4].…”

Determination of Ductile Material Properties by Means of the Small Punch Test and Neural Networks

“…[1±3] Baik et al [4] defined the area under the LDC as small punch fracture energy and found correlations between results from Charpy-V-notch and small punch experiments determining the ductile to brittle transition temperature. Some researchers used the SPT to predict the elastic plastic properties [5,6] and the ductile fracture toughness J Ic [7,8] or the brittle fracture toughness K Ic . [9] Huber et al [10] showed that neural networks (NN) are suitable for the determination of constitutive properties from spherical indentation tests.…”

“…The specimen (8) is clamped between die (9) and down-holder (4), which are supported by the bottom housing part (7). The screw able upper housing part (3) is used to provide the clamping force.…”

“…Ànet i (7) where net i denotes the input for unit i. All units of the input layer i get an external input ex i , which represents in our case the discretized and normalized load displacement curve (case I) or the vector of the normalized material parameters and the normalized punch displacement (case II).…”