Fabrication of High Strength and Ductile Stainless Steel Fiber Felts by Sintering

Wang, J. Z.; Tang, Huiping; Qian, Ma; Li, A. J.; Ma, Jingling; Xu, Zirui; Li, C. L.; Liu, Y.; Wang, Y.

doi:10.1007/s11837-015-1803-z

Cited by 7 publications

(7 citation statements)

References 15 publications

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“…2 in Ref. 5). This observation supports the inference that surface diffusion is limited during the 10-min isothermal sintering at 1000°C while the formation of large sintered joints (>17.5 lm, Fig.…”

Section: Resultsmentioning

confidence: 91%

“…[1][2][3][4] Their production consists of three basic steps: (1) long bundledrawn fibers are cut into short fibers with a lengthto-diameter ratio of $1000, (2) preforms are made of the short fibers through an air-laid process and compacted to required porosity, and (3) compacted preforms are sintered in a special atmosphere. 5 Sintering is a key step in the production of stainless steel fiber felt products. 5,6 Owing to their high dislocation density, as-received bundle-drawn stainless steel fibers exhibit both high strength (900-1700 MPa) and high elasticity ($130 GPa), which can be problematic in the fabrication of thick fiber felt products required for noise control and energy absorption.…”

Section: Introductionmentioning

confidence: 99%

“…5 Sintering is a key step in the production of stainless steel fiber felt products. 5,6 Owing to their high dislocation density, as-received bundle-drawn stainless steel fibers exhibit both high strength (900-1700 MPa) and high elasticity ($130 GPa), which can be problematic in the fabrication of thick fiber felt products required for noise control and energy absorption. For example, to make a 10-mm-thick fiber felt product, the thickness of the air-laid fiber felt preform often reaches 500 mm.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Pre-annealing on Sintering of Stainless Steel Fiber Felt

Tang

Wang

et al. 2017

JOM

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Stainless steel fiber felt is a class of unique porous metal materials. This study investigates the effect of pre-annealing on the sintering of stainless steel fiber felt through quantitative characterization of sintered joints based on synchrotron radiation experiments. The sintered joint size was found to follow a marked normal distribution in fiber felt samples sintered with and without pre-annealing. However, pre-annealing prior to sintering led to a significant reduction in the total number of sintered joints as well as a reduction in the percentage of large sintered joints. Consequently, fiber felt samples sintered with pre-annealing achieved less than half the tensile strength of those sintered without pre-annealing. Delamination through fracture of sintered joints was pronounced in fiber felt samples sintered with pre-annealing, while failure occurred mainly through fracture of individual fibers in those sintered without pre-annealing. It was concluded that sintering without pre-annealing is necessary for the fabrication of high-strength fiber felt products and the reasons are briefly discussed.

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Section: Resultsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Pre-annealing on Sintering of Stainless Steel Fiber Felt

Tang

Wang

et al. 2017

JOM

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“…[13] Additionally, the tensile strength of MFPMs was improved by 50% using an innovative fast sintering process compared with the conventional sintering process. [14] Stainless steel DOI: 10.1002/adem.202201465…”

Section: Introductionmentioning

confidence: 99%

Comparison of Energy Absorption Performance and Mechanical Response of Metal Fiber Porous Materials under Two Strain Rates

Wang

et al. 2022

Adv Eng Mater

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The relationship between dynamic impact response and pore structure of metal fiber porous materials is a frontier interdisciplinary science issue in the fields of materials and mechanics. Dynamic impact (strain rate of 800 s−1) and quasi‐static compressive (strain rate of 10−3 s−1) behavior of stainless steel fiber porous materials (SSFPMs) are discussed and compared for different porosity levels and fiber diameters. Furthermore, the stress wave character during dynamic compression is also analyzed. Results indicate that the compressive properties and the plateau region of the stress–strain curve are affected significantly by porosity and strain rate; high strain rate or low porosity yields higher compressive strength, higher Young's modulus, and shorter plateau region. Moreover, SSFPMs with a porosity of 70% or less may be especially suitable for applying at the quasi‐static compression condition to absorb energy completely. Besides, the optimum porosity or the allowable peak stress at a certain condition can be determined according to the energy absorption diagram of SSFPMs. Additionally, the stress wave propagated inside SSFPMs comprises three waves, the incident, the reflected, and the transmitted ones, independent of porosity and fiber diameter, and the propagation behavior of the stress wave is mainly influenced by porosity, not fiber diameter.

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“…However, the tensile strength of the stainless steel fiber-sintered sheets in the porosity range of 75%-95% was no higher than 1 MPa [9][10][11]. Tang et al fabricated stainless steel fiber felts via the solid-phase sintering method with 28 μm fibers and performed synchrotron radiation experiments to investigate the sintering mechanism and the evolution of the sintered neck, which significantly affect the mechanical strength [12,13]. Zhou et al used 100 μm cutting copper fibers to fabricate PCFSSs via the solid-phase sintering method and systematically studied the effects of the sintering conditions (including the sintering temperature and time), fiber distribution, and porosity on the tensile strength [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Uniaxial Tensile Properties of Soldered Porous Copper Fiber-Sintered Sheets

Liu

Zhou

et al. 2019

Advances in Materials Science and Engineering

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Porous copper fiber-sintered sheets (PCFSSs) with different porosities were fabricated through the solid-phase sintering method using cutting copper fibers. PCFSSs with the same porosity and different porosities were then joined via a fluxless soldering method. By analyzing the uniaxial tensile property of the PCFSSs, the formation mechanism of the soldered PCFSSs was investigated. The difference in the tensile properties between the soldered and original PCFSSs was examined. Experimental results indicated that, for the PCFSSs with homogeneous porosity, reducing the porosity increased the tensile strength and elongation at break significantly. The fluxless soldering method with the lead-free solder resulted in excellent joining of the PCFSSs with the same porosity and different porosities. Moreover, the final tensile strength of the soldered PCFSSs with the same porosity was nearly equal to that of their parent PCFSSs. The tensile strength of the soldered PCFSSs with different porosities depended on the higher-porosity section. After soldering the PCFSSs, Young’s modulus increased and the elongation at break reduced.

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Fabrication of High Strength and Ductile Stainless Steel Fiber Felts by Sintering

Cited by 7 publications

References 15 publications

Effect of Pre-annealing on Sintering of Stainless Steel Fiber Felt

Effect of Pre-annealing on Sintering of Stainless Steel Fiber Felt

Comparison of Energy Absorption Performance and Mechanical Response of Metal Fiber Porous Materials under Two Strain Rates

Fabrication and Uniaxial Tensile Properties of Soldered Porous Copper Fiber-Sintered Sheets

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