Effects of copper content on microstructure and mechanical properties of open-cell steel foams

Sazegaran, Hamid; Hojati, Milad

doi:10.1007/s12613-019-1767-z

“…3. In order to measure the density of steel foams (𝜌𝜌 𝐹𝐹 ) was used equation ( 1) and was obtained by measurement of weight and volume of each specimen and also using Archimedes method and for measure their porosity percentage (𝑃𝑃%)was used equation ( 2) [27]. It should be noted that in equation ( 2), the solid density (𝜌𝜌 𝑆𝑆 ) was considered the same as the density of stainless steel without porosity equal to 8 g/cm3.…”

Section: Materials Synthesismentioning

confidence: 99%

Investigating the mechanical properties of stainless steel foams produced by dissolving spherical urea particles as a space holder

sahraei,

Naserian-Nik,

Sazegaran

2023

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Foam materials are a family of new and advanced materials that, due to their unique characteristics, will have a lot of potential for development in the coming years. The family of foam materials is divided into three categories: metal foams, ceramic foams, and polymer foams. Compared to ceramic and polymer foams, metal foams are newer and their properties and applications are being developed So, it seems that a bright future is waiting for these materials. The current research deals with the production of metal foams made of 316L stainless steel, which has a relatively wide application in the medical industry, especially the construction of implants. For this purpose, the method of dissolving spherical urea particles in water has been used as a spacer. In order to study the effect of porosity and production pressure on the mechanical behavior of 316L stainless steel, a standard pressure test was performed on foam samples produced under different production pressures and porosity percentages and their mechanical properties were investigated. In addition to conducting experimental tests, foam finite element models with zero and 30 percent porosity were created and pressure tests were simulated for them.

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“…For this purpose, urea grains and stainless steel powder (with ratios of 30% by weight of urea to 70% by weight of powder, 32.5% by weight of urea to 67.5% by weight of powder, 35% by weight of urea to 65% by weight of powder, 37.5% by weight Urea weight to 62.5% by weight of powder and 40% by weight of urea to 60% by weight of powder) are placed in a polyethylene container and some water is sprinkled on them and a droplet polyvinyl alcohol as an adhesive is added inside the container. Adding water causes the surfaces of urea grains to become sticky [27,28]. The creation of sticky surfaces in the urea grains and the presence of polyvinyl alcohol causes the stainless steel powder particles to stick on the urea grains.…”

Section: Materials Synthesismentioning

confidence: 99%

Investigating the mechanical properties of stainless steel foams produced by dissolving spherical urea particles as a space holder

Sahraei,

Naserian-Nik,

Sazegaran

2023

Preprint

0

View full text Add to dashboard Cite

Foam materials are a family of new and advanced materials that, due to their unique characteristics, will have a lot of potential for development in the coming years. The family of foam materials is divided into three categories: metal foams, ceramic foams, and polymer foams. Compared to ceramic and polymer foams, metal foams are newer and their properties and applications are being developed So, it seems that a bright future is waiting for these materials. The current research deals with the production of metal foams made of 316L stainless steel, which has a relatively wide application in the medical industry, especially the construction of implants. For this purpose, the method of dissolving spherical urea particles in water has been used as a spacer. In order to study the effect of porosity and production pressure on the mechanical behavior of 316L stainless steel, a standard pressure test was performed on foam samples produced under different production pressures and porosity percentages and their mechanical properties were investigated. In addition to conducting experimental tests, foam finite element models with zero and 30 percent porosity were created and pressure tests were simulated for them.

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“…Cu in an austenitic matrix can be precipitated as finely dispersed Cu-rich phase particles during the aging process, which has an excellent dispersion-strengthening effect. Cu atoms segregated to stacking faults can also pin dislocations and induce a matrix-strengthening effect [ 12 , 13 , 14 , 15 ]. (2) Improvement of formability and processability of steels: Cu can improve the anisotropy of steel and reduce the work hardening index.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu on the Formation of Reversed Austenite in Super Martensitic Stainless Steel

Jiang

¹

,

Zhao

²

2023

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We investigated the effect of Cu on the formation of reversed austenite in super martensitic stainless steel by using X-ray diffraction (XRD), a transmission electron microscope (TEM) and an energy-dispersive spectrometer (EDS). Our results showed that the microstructure of the steels comprised tempered martensite and diffused reversed austenite after the steels were quenched at 1050 °C and tempered at 550–750 °C. The volume fraction of reversed austenite in the steel with 3 wt.% of Cu (3Cu) was more than that with 1.5 wt.% of Cu (1.5Cu). The transmission electron microscope results revealed that the reversed austenite in 1.5Cu steel mainly had the shape of a thin strip, while that in 3Cu steel had a block shape. The nucleation points and degree of Ni enrichment of reversed austenite in 3Cu steel were higher than those in 1.5Cu steel. The reversed austenite was more likely to grow in ε-Cu enriched regions. Therefore, Cu can promote reversed austenite nucleation and growth. The mechanical properties of 3 Cu steel are obviously better than those of 1.5Cu steel when tempered at 550–650 °C.

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Effects of copper content on microstructure and mechanical properties of open-cell steel foams

Cited by 10 publications

References 44 publications

Investigating the mechanical properties of stainless steel foams produced by dissolving spherical urea particles as a space holder

Investigating the mechanical properties of stainless steel foams produced by dissolving spherical urea particles as a space holder

Investigating the mechanical properties of stainless steel foams produced by dissolving spherical urea particles as a space holder

Effect of Cu on the Formation of Reversed Austenite in Super Martensitic Stainless Steel

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