Effects of geometric dimension and grain size on impact properties of 316L stainless steel

Li, Jiansheng; Qin, Wenbo; Peng, Peng; Chen, Ming; Yue, Wen; Kang, Jiqiang; Meng, Dezhong; She, Dingshun; Zhu, Xiebin; Li, Yusheng

doi:10.1016/j.matlet.2020.128908

Cited by 17 publications

(5 citation statements)

References 22 publications

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“…The reason is that the large grain size has few grain boundary defects, and the cracks are not easy to initiate and propagate. [ 31 ] At present, the grain size of QN1803 (37 ± 6 μm) is slightly larger than 304 steel (30 ± 4 μm), and we can infer that QN1803 will present better impact toughness than 304 at various temperatures. In fact, according to the load–deflection curves, the impact property of QN1803 is better than 304 at 0–100 °C, while it is opposite at −40–192 °C.…”

Section: Resultsmentioning

confidence: 85%

Insights into the Impact Behavior and Deformation Substructure Evolution of the N‐Bearing QN1803 and 304 Stainless Steels

Zhao

Wei

Zheng³

et al. 2022

steel research int.

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The impact behaviors of N‐bearing QN1803 and 304 stainless steels are studied using instrumented Charpy impact test in the range of −192–100 °C. The fracture and deformation substructures are systematically investigated by scanning electron microscopy and transmission electron microscopy. The results show that QN1803 presents ductile–brittle transition temperature (DBTT) and 304 shows ductile fracture. With increasing temperature, the stacking fault energy (SFE) of QN1803 and 304 increases, but the former is always lower than the latter. QN1803 presents low impact toughness with low‐density dislocation at −192 °C. At high temperature, QN1803 and 304 show good impact toughness and the deformation substructures are dominated by high‐density dislocations and deformation twinning.

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Section: Resultsmentioning

confidence: 85%

Insights into the Impact Behavior and Deformation Substructure Evolution of the N‐Bearing QN1803 and 304 Stainless Steels

Zhao

Wei

Zheng³

et al. 2022

steel research int.

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“…3a-c). After cold swaging notch toughness dropped from 1.58 to 0.70 MJ/m 2 (Table 1), most likely due to the microstructure refinement [11]. In comparison to the initial condition (Fig.…”

Section: Resultsmentioning

confidence: 92%

Excellent strength-toughness synergy in metastable austenitic stainless steel due to gradient structure formation

et al. 2021

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“…The precipitation (including different GB precipitates) changes the creep strength [58]. GB wetting by other solid phases was also observed in TiC-reinforced steel matrix composite [38], 316L stainless steel [39], Fe-2Cu-1.5Ni-1.5Mn low-alloyed steel [41], boron-alloyed 304 and 316 stainless steels [42], Fe-0.2%C-0.92%Cr-0.52%Mn-0.24%Si-0.16%Mo alloy [43], χ-phase between ferrite grains in super duplex stainless steel S32750 [44], gas nitrided die steel modified by a plasma detonation [45], hydrogen treated 304 austenitic stainless steel [47], the experimental Fe-2.03Mn-1.92Cu-1.35Ni-1.04Al-0.84Si-0.26-0.16NbMo-0.16C alloy annealed at 700 and 720 • C [48].…”

Section: Influence Of Gb Wetting By the Second Solid Phase On The Pro...mentioning

confidence: 84%

Grain Boundary Wetting by the Second Solid Phase: 20 Years of History

Straumal

Lepkova

Korneva

et al. 2023

Metals

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Grain boundaries (GBs) can be wetted by a second phase. This phase can be not only liquid (or melted), but it can also be solid. GB wetting can be incomplete (partial) or complete. In the case of incomplete (partial) wetting, the liquid forms in the GB droplets, and the second solid phase forms a chain of (usually lenticular) precipitates. Droplets or precipitates have a non-zero contact angle with the GB. In the case of complete GB wetting, the second phase (liquid or solid) forms in the GB continuous layers between matrix grains. These GB layers completely separate the matrix crystallites from each other. GB wetting by a second solid phase has some important differences from GB wetting by the melt phase. In the latter case, the contact angle always decreases with increasing temperature. If the wetting phase is solid, the contact angle can also increase with increasing temperature. Moreover, the transition from partial to complete wetting can be followed by the opposite transition from complete to partial GB wetting. The GB triple junctions are completely wetted in the broader temperature interval than GBs. Since Phase 2 is also solid, it contains GBs as well. This means that not only can Phase 2 wet the GBs in Phase 1, but the opposite can also occur when Phase 1 can wet the GBs in Phase 2. GB wetting by the second solid phase was observed in the Al-, Mg-, Co-, Ni-, Fe-, Cu-, Zr-, and Ti-based alloys as well as in multicomponent alloys, including high-entropy ones. It can seriously influence various properties of materials.

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Effects of geometric dimension and grain size on impact properties of 316L stainless steel

Cited by 17 publications

References 22 publications

Insights into the Impact Behavior and Deformation Substructure Evolution of the N‐Bearing QN1803 and 304 Stainless Steels

Insights into the Impact Behavior and Deformation Substructure Evolution of the N‐Bearing QN1803 and 304 Stainless Steels

Excellent strength-toughness synergy in metastable austenitic stainless steel due to gradient structure formation

Grain Boundary Wetting by the Second Solid Phase: 20 Years of History

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