In situ small-scale mechanical testing under extreme environments

Abstract

Abstract

Advances in in situ nanomechanical testing

“…The impact of environment is a critical area of in situ nanomechanical testing that has expanded in recent years. In their article, Barnoush et al 30 report on recent progress in extending in situ nanomechanics to low (-140°C) and elevated temperatures (1000°C) and the challenges that need to be considered. Similarly, recent advances in strain-rate-dependent in situ nano-and micromechanical experiments ranging from creep at 10 -6 s -1 to impact testing at 10 6 s -1 are summarized.…”

“…Similarly, recent advances in strain-rate-dependent in situ nano-and micromechanical experiments ranging from creep at 10 -6 s -1 to impact testing at 10 6 s -1 are summarized. Barnoush et al 30 report longstanding challenges in understanding the complex mechanisms of hydrogen embrittlement. This gained new momentum by in situ nanomechanical testing.…”

“…Advances in mechanical testing instrumentation and testing methods under such special environments are discussed in the Barnoush et al article. 30…”

Functional Materials Under Stress: In Situ TEM Observations of Structural Evolution

“…With the recent development of environmental in-situ TEM techniques, more in operando conditions can be applied (e.g. temperature, gases or radiation) simultaneously with external mechanical loading [20,84] .…”

New Developments in Nanomechanical Methods

“…7,8 The advent of site-specific focused ion beam (FIB) milling 9 roughly 2 decades ago has enabled yet another rapid expansion of nanomechanical methods, specifically in situ mechanical tests conducted within a scanning electron microscope (SEM) using a depth-sensing holder. 10,11 The method enables concurrent collection of load-displacement data and SEM resolution images or video of a specimen throughout the deformation process. In situ techniques offer transformative insight into deformation mechanisms and have thus been broadly adopted to test a wide range of materials in numerous configurations, including compression pillars, [12][13][14] cantilevers or three-point bend beams, [15][16][17][18] tensile bars, 14,19 indentation, [20][21][22] and creep.…”