Thermophysical Properties and Solidification Defects of Fe-22Mn-0.7C TWIP Steel

Peng, Lan; Zhang, Jiaquan

doi:10.1002/srin.201500022

Cited by 34 publications

(8 citation statements)

References 42 publications

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“…Pichler pointed out that the macro‐segregation of solute elements will affect the stability of austenite and delay the growth of ferrite, thus had influence on the final solidification structures. Some studies have shown that in austenite steel with high Mn content, Mn will segregate between the dendrites in the solidification process. Markus Daamen et al observed the similar positive segregation tendency of Mn in a Fe–29Mn–0.3C steel produced via strip casting.…”

Section: Introductionmentioning

confidence: 99%

Study on Micro Segregation of High Alloy Fe–Mn–C–Al Steel

Shen

Yang

Liu

et al. 2019

steel research int.

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The segregation patterns of solute elements in the Fe–17.1Mn–0.24C–1.38Al steel are systemically investigated by experiments and simulations. The electron probe microanalyzer (EPMA) is conducted to assess possible micro segregation. The result indicates that with the increase of solid fraction in dendrite arms, Mn shows a positive segregation tendency, C uniformly distributes, and Al content slightly fluctuates. Compared with micro segregation models, experimental results of C match well with the Brody‐Fleming model. The segregation ratios of Mn are in good agreement with the lever‐rule. There is no certain regularity displayed between the experimental and calculation results about the segregation ratios of Al. The matrix of the steel is inhomogeneous with severe Mn and C micro segregation in the inter dendritic zone, whereas Al shows the opposite trend. A multicomponent phase field method coupled to thermodynamic calculations is used to simulate the concentration profiles of solute elements in the dendrite arms, and the numerical results are in favorable agreement with the experimental ones. Finally, the roles of undercooling and cooling rate on dendrite morphology and micro segregation of Mn are investigated. It reveals that large undercoolings could improve Mn segregation, while cooling rates have little effect on the maximum Mn segregation concentration but contribute to reduce the total inter dendritic Mn amount. They both have refinement effects on the dendritic structure. Those are helpful to understand and improve the segregations in Fe–Mn–C–Al steels.

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Section: Introductionmentioning

confidence: 99%

Study on Micro Segregation of High Alloy Fe–Mn–C–Al Steel

Shen

Yang

Liu

et al. 2019

steel research int.

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“…Specifically, the fusion line was not the poorest zone, which was quite different from the ferritic steels like low-alloy high-strength steels [ 29 ]. It was because that the weld metals were designed to have the similar chemical composition (in Table 5 ) with the base metal (in Table 2 ), which allowed the weld pool to solidify with the same phase of austenite and the weld metal not to undergo any phase transformations during continuous cooling [ 30 ]. Although the grain coarsened at FL, the coarse grain was fortunately not detrimental to cryogenic toughness for high-Mn steel [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

Study on the Novel High Manganese Austenitic Steel Welded Joints by Arc Welding for Cryogenic Applications of LNG Tanks

Zhang

Wang

et al. 2023

Materials

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The novel high-Mn austenitic steel is becoming a promising steel for cryogenic applications of LNG tanks. The welded joints take a critical role in cryogenic service for storage tanks. In this work, we developed well-matched high-Mn welding consumables and prepared the welded joints by shielded metal arc welding (SMAW), submerged arc welding (SAW) and gas tungsten arc welding (GTAW). The detailed welding parameters were proposed first, then the welding quality, mechanical properties, and microstructure were investigated. The results show that good welding quality, excellent mechanical properties, and stable levels of mechanical properties were obtained for high-Mn steel welded joints using similar welding consumables, the solid core of electrodes, and solid welding wires. Notably, the lowest cryogenic absorbed energy was found at 5 mm away from the fusion line rather than at the fusion line. The hardness of the welded joints was detected to be less than 280 HV due to the whole austenitic microstructure.

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“…The temperature-dependent thermal conductivity was adopted from experimental measurements on a similar alloy. 73 Since the laser radiation interacts mostly with the liquid melt pool during LPBF, 74 an absorption coefficient of 0.41 for liquid iron irradiated by an Nd-YAG laser was chosen. 75 Five scanning tracks with a bi-directional scan strategy were modeled.…”

Section: Thermal Fieldmentioning

confidence: 99%

Optimal Design for Metal Additive Manufacturing: An Integrated Computational Materials Engineering (ICME) Approach

Motaman

Kies

Köhnen

et al. 2020

JOM

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We present our latest results on linking the process-structure-propertiesperformance (PSPP) chain for metal additive manufacturing (AM), using a multi-scale and multi-physics integrated computational materials engineering (ICME) approach. The abundance of design parameters and the complex relationship between those and the performance of AM parts have so far impeded the widespread adoption of metal AM technologies for structurally critical load-bearing components. To unfold the full potential of metal AM, establishing a full quantitative PSPP linkage is essential. It will not only help in understanding the underlying physics but will also serve as a powerful and effective tool for optimal computational design. In this work, we illustrate an example of ICME-based PSPP linkage in metal AM, along with a hybrid physics-based data-driven strategy for its application in the optimal design of a component. Finally, we discuss our outlook for the improvement of each part in the computational linking of the PSPP chain.

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Thermophysical Properties and Solidification Defects of Fe-22Mn-0.7C TWIP Steel

Cited by 34 publications

References 42 publications

Study on Micro Segregation of High Alloy Fe–Mn–C–Al Steel

Study on Micro Segregation of High Alloy Fe–Mn–C–Al Steel

Study on the Novel High Manganese Austenitic Steel Welded Joints by Arc Welding for Cryogenic Applications of LNG Tanks

Optimal Design for Metal Additive Manufacturing: An Integrated Computational Materials Engineering (ICME) Approach

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