2020
DOI: 10.1016/j.msea.2020.139146
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Improving strength-ductility synergy in 301 stainless steel by combining gradient structure and TRIP effect

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Cited by 27 publications
(6 citation statements)
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“…This increased mechanical incompatibility can lead to more strain gradient in the vicinity of α' and γ interfaces. [33,34] In this case, the strain gradients need to be accommodated through more density of geometrically necessary dislocations, [35,36] which causes high HDI stress in the AT680-10 sample, as verified by the present LUR results (Figure 8). Therefore, the higher YS and UTS in the AT680-10 sample compared with those in the A680-10 sample are probably due to the HDI stress strengthening.…”
Section: Impact Of the Low-temperature Tempering On The Trip Behavior...supporting
confidence: 61%
“…This increased mechanical incompatibility can lead to more strain gradient in the vicinity of α' and γ interfaces. [33,34] In this case, the strain gradients need to be accommodated through more density of geometrically necessary dislocations, [35,36] which causes high HDI stress in the AT680-10 sample, as verified by the present LUR results (Figure 8). Therefore, the higher YS and UTS in the AT680-10 sample compared with those in the A680-10 sample are probably due to the HDI stress strengthening.…”
Section: Impact Of the Low-temperature Tempering On The Trip Behavior...supporting
confidence: 61%
“…First, the as-SMATed gradient structure indeed exhibits an acceptable combination of strength and ductility, with a yield strength of ~1000 MPa and uniform elongation of ~30%. This can be attributed to (i) the hetero-deformation induced strengthening and hardening that is accompanied by strain gradient accumulation and back stress development [ 18 , 23 , 41 ], and (ii) the strong transformation-induced plasticity effect enhanced by gradient microstructure [ 3 , 27 ].…”
Section: Resultsmentioning
confidence: 99%
“…Moreover, the recrystallized austenitic domains in the nanostructured surface layer are intrinsically high in work hardening capability. The high long-range internal stress can, in turn, enhance the transformation-induced plasticity effect [ 3 , 27 ]. These physics are responsible for the high strain hardening rate and good ductility of SA x s samples ( Figure 5 b).…”
Section: Resultsmentioning
confidence: 99%
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“…The gradient structure is caused by the attenuated strain rate of SMAT [ 21 , 27 ]. During impacting deformation, three competitive mechanisms control the microstructure of the austenitic SS, basically, slip, twinning, and transformation [ 30 , 31 ], which are all relative to the impacting strain rate. Two impacting velocities are used in this experiment.…”
Section: Discussionmentioning
confidence: 99%