The dynamic recrystallization mechanism of Nb contained 316LN

Li, Jingdan; Liu, Jiansheng

doi:10.1088/2053-1591/ab296c

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…As the strain is further increased, the high-density dislocations are consumed to form new DRX grains. [30,47,48] Then, DRX is the main softening mechanism, and the flow stress decreases continuously. However, as the true strain exceeds 0.5, the true stress increases in the subsequent deformation process because of the friction between the sample and tools, as shown in Figure 3b,d.…”

Section: Flow Behavior and Deformation Mechanisms Of The Sa Superalloymentioning

confidence: 99%

Effects of Stress‐Aging Pretreatment on Hot Deformation Behavior and Microstructure Evolution of a Ni–Cr–Nb–Mo–Ti Alloy

Cheng

Lin

et al. 2021

Adv Eng Mater

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Hot deformation behavior and microstructure evolution of stress and stress‐free aged NiCrNbMoTi alloy are investigated by hot compressive tests. The impacts of stress aging upon the flow softening and dynamic recrystallization (DRX) behavior are analyzed. Also, the variations of dislocation substructures are studied. The basket‐weave δ‐phases induced by stress‐aging pretreatment can refine grains during hot deformation. On the one hand, the basket‐weave δ‐phases mutually intersect and form some enclosure spaces. Then, the dislocations which are restrained in these enclosure spaces can increase the potential sites for DRX nucleation. On the other hand, the growth of DRX grain is significantly hindered by the basket‐weave δ‐phases. The peak stress increases substantially as the stress‐aging stress rises. The dislocations pinned near the basket‐weave δ‐phases can hinder the migration of grain boundaries and accelerate the DRX process during hot deformation.

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Section: Flow Behavior and Deformation Mechanisms Of The Sa Superalloymentioning

confidence: 99%

Effects of Stress‐Aging Pretreatment on Hot Deformation Behavior and Microstructure Evolution of a Ni–Cr–Nb–Mo–Ti Alloy

Cheng

Lin

et al. 2021

Adv Eng Mater

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“…The limiting oxygen index (LOI) increased from 20.8% to 26.7% with the addition of 5 wt% ZB, which explained the synergistic flame retardancy of ZB and AHP, However, they focus on the study of flame retardant properties, lack of exploration in ceramifiable properties. Li et al [ 20 ] replaced the proportion of mica in silicone rubber with AHP to improve the strength of the residue. It demonstrated that AHP also has a significant effect on ceramic‐like residue forming.…”

Section: Introductionmentioning

confidence: 99%

Improved flame retardancy and ceramifiable properties of PE composites by the combination of aluminum hypophosphite and zinc borate

Qian

Sun

Zhang

et al. 2023

Vinyl Additive Technology

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Ceramifiable polyolefin materials protect circuits by forming compact ceramic layers under fire conditions, and can have an excellent application prospect in the refractory cable field. In this paper, Aluminum hypophosphite (AHP) and zinc borate (ZB) were added to further improve flame retardancy and ceramifiable properties of polyethylene (PE)/silicon powder (SP)/wollastonite (WS)/ glass frits (GF) composites. The LOI values of composites with AHP/ZB can reach 23.5%, significantly higher than that of PE/SP/WS/GF composites (19.6%). The thermal stability behavior and char yield behaviors of composites could also be characterized by the TG test. The incorporation of AHP/ZB enhances the flexural strength of residue formed at 1000 C from 0.1 to 20.5 MPa. In addition, a new crystal is formed at high temperatures and is identified as the calcium aluminum phosphate phase [CAP, Ca 9 Al (PO 4 ) 7 ] by XRD analysis. The flow of molten ZB accelerates the reaction of AHP and WS, and this eutectic reaction promotes the formation and stability of ceramics. Furthermore, the SEM analysis reveals the fluxing effect of ZB at low temperatures and AHP at high temperatures. The incorporation of AHP/ZB with a ratio of 1:1 could effectively avoid the vitrification of ceramics and improve their dimensional stability.

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