Mechanical properties and fracture mechanism of boron-containing 304L austenitic stainless steel densified by liquid phase sintering

Wu, Ming-Wei; Lin, Zih-Jie; Lin, Chia-Yu; Chi, Si-Xian; Tsai, Mo-Kai; Ni, Kai

doi:10.1016/j.msea.2021.141182

Cited by 15 publications

(12 citation statements)

References 37 publications

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“…Adding 0.6 wt% B to 304L obviously decreased the porosity, and the formation of eutectic areas was clearly observed, as shown in Figure 3 b,c. The matrices of the 304L and 304L + 0.6B steels were austenite [ 3 ]. Figure 4 shows the microstructures of the 410L and 410L + 0.6B steels sintered at 1250 °C for 1 h in hydrogen.…”

Section: Resultsmentioning

confidence: 99%

“…They found that the microhardnesses of M 2 B boride and M 3 (B,C) borocarbide are 1562–1619 HV and 1023–1103 HV, respectively. In a previous study, the boride in 304L + 0.6B was identified as M 2 B boride by electron backscatter diffraction [ 3 ]. The elemental distributions of B and Cr atoms in 304L + 0.6B completely matched those in 410L + 0.6B and 410 + 0.6B.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the crystal structures of borides are also modified by the alloying elements. Several types of boride structures, such as M 2 B, M 3 (B,C), and M 23 (B,C) 6 , where M represents the metallic elements, have been experimentally identified in the literature [ 3 , 12 , 13 , 14 , 17 , 18 ]. Recently, You et al [ 14 ] determined that MoFe(C,B) boride (WCoB-type) exists in the Fe-5Mo-0.8C-0.4B PM steel by using an atomic resolution high angle annular dark field (HAADF) scanning transmission electron microscope (STEM).…”

Section: Introductionmentioning

confidence: 99%

“…The mechanical properties of B-alloyed PM stainless steels have been investigated in various studies [ 2 , 3 , 12 , 15 ]. Wu et al [ 3 ] studied the effects of B on the mechanical properties and fracture behaviors of PM 304L and found that 0.6 wt% B additive significantly increases the ultimate tensile strength by 63% without obvious sacrifices to tensile elongation. Pandya et al [ 1 ] found that increasing the sintering temperature of PM 316L from 1200 °C to 1400 °C decreases the porosity and improves the corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

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Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

Tsao

Tsai³

et al. 2022

Materials

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Powder metallurgy (PM) has been widely used to produce various steels in industry, mainly due to its capabilities for manufacturing nearly net-shaped products and mass production. To improve the performances of PM stainless steels, the roles of 0.6 wt% B additive in the microstructures, mechanical properties, and corrosion resistances of PM 304L austenitic, 410L ferritic, and 410 martensitic stainless steels were investigated. The results showed that adding 0.6 wt% B significantly improved the sintered densities of the three kinds of stainless steels due to the liquid phase sintering (LPS) phenomenon. The borides in 304L + 0.6B, 410L + 0.6B, and 410 + 0.6B were rich in B and Cr atoms but deficient in Fe, Ni, or C atoms, as analyzed by electron probe micro-analysis. Furthermore, the B additive contributed to the improved apparent hardness and corrosion resistance of PM stainless steels. In the 410L stainless steel, the 0.6 wt% B addition increased the corrosion voltage from −0.43 VSCE to −0.24 VSCE and reduced the corrosion current density from 2.27 × 10−6 A/cm2 to 1.93 × 10−7 A/cm2. The effects of several factors, namely: porosity; the generation of boride; the matrix/boride interfacial areas; Cr depletion; and the microstructure on the corrosion performances are discussed. The findings clearly indicate that porosity plays a predominant role in the corrosion resistances of PM austenitic, ferritic, and martensitic stainless steels.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

Tsao

Tsai³

et al. 2022

Materials

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“…Powder metallurgy (PM) is a cost-effective process for manufacturing nearly net-shaped metallic materials, particularly Fe-based alloys, in mass production, one that has been widely investigated [ 11 , 12 , 13 , 14 , 15 ]. However, the use of PM technology to fabricate LMCs has been rare to date in industry.…”

Section: Introductionmentioning

confidence: 99%

The Microstructure of Fe-Based Laminated Metal Composite Produced by Powder Metallurgy

et al. 2021

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Powder metallurgy (PM) is a versatile process to manufacture nearly net-shaped metallic materials in industry. In this study, the PM process was used to fabricate two Fe-based laminated metal composites (LMCs), Fe-4Ni-3Cr-0.5Mo-0.5C/Fe and 410/304L. The results showed that after sintering, the LMCs were free of interfacial cracks and distortion, indicating that the PM process is a feasible means for producing these LMCs. In the Fe-4Ni-3Cr-0.5Mo-0.5C/Fe LMC, the diffusion of C resulted in the generation of a continuous pearlite layer between the Fe-4Ni-3Cr-0.5Mo-0.5C and Fe layers and a ferrite/pearlite mixture in the Fe layer. In the 410/304L LMC, the difference in the chemical potentials of C between the 304L and 410 layers led to the uphill diffusion of C from the 410 layer to the 304L layer. A continuous ferrite layer was thus formed near the interface of the 410 layer. Furthermore, a martensite layer of about 50 μm thickness was generated at the interface due to the high Cr and Ni content.

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The effect of boron on the properties and structure of austenitic stainless steels

Babenko,

Shartdinov,

Salina

et al. 2024

Metallurgist

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Mechanical properties and fracture mechanism of boron-containing 304L austenitic stainless steel densified by liquid phase sintering

Cited by 15 publications

References 37 publications

Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

The Microstructure of Fe-Based Laminated Metal Composite Produced by Powder Metallurgy

The effect of boron on the properties and structure of austenitic stainless steels

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