In situ micro-tensile testing on proton beam-irradiated stainless steel

Extracting information from noisy data: strain mapping during dynamic in situ SEM experiments

“…single crystals, individual precipitates or grain boundaries, it is still rarely utilized due to the challenging experimental conditions. However, in comparison to the frequently employed push-to-pull device method for tensile testing of individual manipulated, placed and fixed objects [8][9][10][11][12], the benefit of having multiple specimens besides each other is non-negligible [17]. While the easier experimental setup of in situ micropillar compression also allows for multiple specimens in one session, it suffers from the fact that due to the constraints from the tip and the base, the observed deformation behaviour is not always exclusively material-dependent [35,36].…”

“…While indentation based techniques, such as nanoindentation or micropillar compression, are by far the most common methods, tensile testing in such in situ setups has been conducted less frequently, as the experimental effort is considerably higher [6][7][8]. Independent of whether a push-to-pull geometry [8][9][10][11][12] or a gripping geometry [6,[13][14][15][16][17] is employed, the sample preparation is more tedious and the time required to conduct an experiment is distinctly longer compared to a single nanoindentation or microcompression test. Therefore, it is desirable to extract as much information as possible from such an individual tensile experiment.…”

Micromechanical testing of unirradiated and helium ion irradiated SA508 reactor pressure vessel steels: Nanoindentation vs in-situ microtensile testing

“…Micromechanical testing is still a relatively novel technique and microtensile specimens have been manufactured using gallium FIB [19][20][21][22][23][24][25][26][27][28][29] broad ion milling on protective stencil masks [30,31] xenon 3 FIB [32] and film deposition and lithographic structuring followed by local etching [33]. Microtensile testing has been applied to ion irradiated materials and previous work considers ion irradiated nickel [27][28][29] stainless steel [21] and low alloy steel [32]. This work presents in-situ micro tensile testing together with nanoindentation of a novel manufactured RPV steel: hot isostatic pressed (HIP) SA508 grade 3 steel.…”

Microstructure Evolution and Nanotribological Properties of Different Heat-Treated AISI 420 Stainless Steels after Proton Irradiation

“…However, this work did not address the effects of proton irradiation on the tribological and wear properties. Usually, proton irradiation can cause point defects in the crystal near the material’s surface; lattice distortion caused by the crystal defects result in the surface-hardening effect [18,25]. Protons are charged particles, and their penetration ability into materials is dependent on their energy.…”