Evolution of aluminum particle-involved phase transformation and pore structure in an elemental Fe–Mn–Al–C powder compact during vacuum sintering

Xu, Zhigang; Du, Jingheng; Zhuang, Chuanbing; Wang, Chuanbin; Shen, Qiang

doi:10.1016/j.vacuum.2020.109289

Cited by 12 publications

(5 citation statements)

References 56 publications

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“…The residual Al particles transformed into liquid, diffusing continuously and reacting with Fe and Mn particles until it was completely consumed. [ 28 ] In the Fe–Mn–C sample, Fe particles were slender strips (see Figure 7A1,A2) surrounded by fine Mn particles. No obvious Fe–Mn diffusion zone was observed.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, Springer et al [ 20 ] and Jin et al [ 32 ] studied Fe–30Mn–(0, 2, 4, 6, 8)Al–1.2C and Fe–30Mn–(0, 2.7)Al–1C respectively, and the results showed that the addition of Al to high‐Mn steels could promote κ‐carbide precipitation, which was a unique strengthening mechanism in the Fe–Mn–Al–C steels bearing high amounts of Al and C. [ 33 ] It is also noted that Al undergoes liquid‐phase transformation during high‐temperature sintering. [ 28 ] With the increase of Al content, a significant amount of liquid Al diffuses into the Fe and Mn matrix and reacts with them. This contributes to the formation of pores in the steel.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16][17][18] In recent years, many studies revealed that Al had a significant impact on the mechanical properties and microstructure of steel. [19][20][21][22][23][24][25][26][27][28] It was reported that the density and Young's modulus could be reduced by 1.3% and 2% with the increase of 1 wt% Al in the steel, [23] respectively. Park et al [21] found that Al addition into the fully austenitic high-Mn steel (Fe-22Mn-(0-6)Al-0.6C) was helpful to enhance the yield strength.…”

mentioning

confidence: 99%

“…strengthening mechanism in the Fe-Mn-Al-C steels bearing high amounts of Al and C. [33] It is also noted that Al undergoes liquid-phase transformation during high-temperature sintering. [28] With the increase of Al content, a significant amount of liquid Al diffuses into the Fe and Mn matrix and reacts with them. This contributes to the formation of pores in the steel.…”

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confidence: 99%

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Effect of Al Content on the Microstructure and Mechanical Properties of the Sintered Fe–Mn–Al Porous Steel

Wang,

Zhang,

Liang

et al. 2023

Adv Eng Mater

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Al content is of great importance for the evolution of the microstructure and compressive performance of the high‐Mn and high‐Al porous steels. Herein, Fe–Mn–Al porous steels with different Al contents are prepared via powder sintering at different temperatures. The results show that the main phases of the sintered samples at 640 °C are α‐Fe, α‐Mn, and Al, while a small amount of Fe2Al5 and Al8Mn5 exists in the samples with 15 and 20 wt% Al. At 1200 °C, the sintered sample with 5 wt% Al is composed of γ‐Fe, while those with 15 and 20 wt% Al are mainly α‐Fe. The length of Mn depletion region and porosity of the samples increase with the increase of Al content. The largest total and open porosity are observed in the 1200 °C‐sintered sample with 20 wt% Al, which are 63.1 and 60.7 vol%, respectively. The compressive strength decreases sharply from 770 MPa for the sample with 5 wt% Al to 7.5 MPa with 15 wt% Al, after sintering at 1200 °C. Ductile fracture occurs in the sample with 5 wt% Al, while brittle fracture is the main fracture mode in those with 15 and 20 wt% Al.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Effect of Al Content on the Microstructure and Mechanical Properties of the Sintered Fe–Mn–Al Porous Steel

Wang,

Zhang,

Liang

et al. 2023

Adv Eng Mater

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“…The measurement value is larger than the calculation value. During solution and rolling, the lattice is distorted and shows apparent dislocations (Figure 6c), which are marked by T. The ν-Al 11 Mn 4 phase is formed by the following reactions [28]: 6Al + Mn → Al 6 Mn (1) 2Al 6 Mn + Mn → 3Al 4 Mn (2) 11Al 4 Mn + 5Mn → 4Al 11 Mn 4 (3)…”

Section: Tem Analysis Of Precipitatesmentioning

confidence: 99%

Effect of Sr on Microstructure and Strengthening Mechanism of Al-4.6Mg Alloy

Yang

Dong

et al. 2023

Materials

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The as-cast Al-4.6Mg alloy was subjected to deformation and sensitization–desensitization heat treatment, and then the microstructure and the enhancement mechanism of Sr were investigated by optical microscopy, scanning electron microscopy–energy-dispersive spectroscopy, electron backscatter diffraction, and transmission electron microscopy. The precipitation phases of Al-4.6Mg alloy were mainly β-Al3Mg2, Al6Mn, and Al6(Mn Cr), and the nanoscale precipitation phases were Al3Mn and Al11Mn4. The formation of β-Al3Mg2 was hindered by the addition of 0.1 wt.% Sr. In addition, the precipitate phase Al4Sr and the nano-sized precipitate phase τ-Al38Mg58Sr4 were uniformly distributed in the spherical matrix. The addition of Sr promoted the redissolution of Mg atoms in Al-4.6 Mg alloy, increasing the solubility of Mg in the α-Al matrix from 4.7 wt.% to 5.1 wt.%. The microstructure analysis showed that Sr addition inhibited the recovery and recrystallization of the alloy because the Sr element elevated the recrystallization temperature. As a result, the grain deformation was intensified, the grain size was decreased from 6.96 μm to 5.39 μm, the low-angle grain boundaries were increased from 78.7 at % to 84.6 at %, and the high-angle grain boundaries were increased from 21.3 at % to 15.4 at %. Furthermore, the mechanical properties of the alloy were significantly improved, and the plasticity degraded after the addition of the Sr element. The yield strength of the alloy was enhanced mainly through fine grain strengthening, dispersion strengthening, solid solution strengthening, and working hardening. The strengthening mechanisms were analyzed in detail.

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Effect of Al on Microstructure and Tensile Properties of a PM Fe–22Mn–0.6C Steel

Zhang,

Wang,

Zhao

et al. 2024

Metall Mater Trans A

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Evolution of aluminum particle-involved phase transformation and pore structure in an elemental Fe–Mn–Al–C powder compact during vacuum sintering

Cited by 12 publications

References 56 publications

Effect of Al Content on the Microstructure and Mechanical Properties of the Sintered Fe–Mn–Al Porous Steel

Effect of Al Content on the Microstructure and Mechanical Properties of the Sintered Fe–Mn–Al Porous Steel

Effect of Sr on Microstructure and Strengthening Mechanism of Al-4.6Mg Alloy

Effect of Al on Microstructure and Tensile Properties of a PM Fe–22Mn–0.6C Steel

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