Accelerated biodegradation and improved mechanical performance of pure iron through surface grain refinement

Bagherifard, Sara; Molla, Mauro Filippo; Kajánek, Daniel; Donnini, Riccardo; Hadzima, Branislav; Guagliano, Mario

doi:10.1016/j.actbio.2019.05.033

Cited by 40 publications

(20 citation statements)

References 65 publications

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“…SSP is generally used for nanocrystallizaion of the surface layer of material [19]. The effect of SSP has been investigated in the past few years on different materials including 39NiCrMo3 low-alloy steel, nodular cast iron with ferrite-pearlite matrix, 316 L stainless steel, AZ31 Magnesium alloy, AISI 1017 mild steel and pure titanium and Al alloys [20][21][22][23][24]. Moreover, researchers have investigated the residual stress relaxation of conventionally shot peened materials and its effects on fatigue behavior at different time steps up to fatigue failure on AISI 4140 steel, S30432 austenite steel, JIS S45C medium carbon steel and 2024-T351 aluminum alloy [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Effects of Conventional and Severe Shot Peening on Residual Stress and Fatigue Strength of Steel AISI 1060 and Residual Stress Relaxation Due to Fatigue Loading: Experimental and Numerical Simulation

et al. 2020

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This study investigates and compares the effects of different shot peening treatments including conventional and severe shot peening on microstructure, mechanical properties, fatigue behavior, and residual stress relaxation of AISI 1060 steel. Shot peening treatments were applied with two Almen intensities of 17 and 21 A and a wide ranges of coverage (100%–1500%). Various microstructural observations were carried out to analyze the evolution of microstructure. Microhardness, residual stress and surface roughness measurements and also axial fatigue test were performed. Moreover, the extent of the residual stress relaxation during cyclic loading was investigated by means of XRD measurements. Furthermore, numerical simulation of residual stress relaxation due to fatigue loading was carried out and validated against experimental investigations. The comparison indicated a good agreement for the surface residual stress relaxation up to 100 cycles. The experimental results indicated the efficiency of severe shot peening processes in obtaining nanostructured surface layer and achieving superior mechanical properties and fatigue behavior. Also, residual stress measurements revealed that stress relaxation started with a high rate at the initial stages of loading and gradually increased at higher number of cycles which was lower in the case of severely shot peened samples compared to the conventionally treated ones. Graphic Abstract

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Section: Introductionmentioning

confidence: 99%

Effects of Conventional and Severe Shot Peening on Residual Stress and Fatigue Strength of Steel AISI 1060 and Residual Stress Relaxation Due to Fatigue Loading: Experimental and Numerical Simulation

et al. 2020

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“…How to improve the toughness of composites through reasonable interface design is a key problem. It has been reported that grain refinement can improve the strength and toughness of metal materials, hence, suitable additives can be sought to refine the grain 10 …”

Section: Introductionmentioning

confidence: 99%

“…It has been reported that grain refinement can improve the strength and toughness of metal materials, hence, suitable additives can be sought to refine the grain. 10 In recent years, many pieces of literature have reported that musselinspired surface chemical modification method is simple and widely applicable. For example, dopamine or its derivatives can produce polydopamine (PDA) on many substrates, in which viscosity is particularly good.…”

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confidence: 99%

Strength and toughness of carbon fibers reinforced rigid polyurethane composites by adsorbing tannic acid and refining Ni grains on carbon fibers surface

Liu

Feng

et al. 2020

Polymers for Advanced Techs

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In this article, short carbon fibers (CFs) reinforced rigid polyurethane (RPU) composites were prepared with the aim of improving both strength and toughness. A tannic acid (TA)‐nickel (Ni) composite coating was spontaneously co‐deposited onto CFs surface by a one‐step electrodeposition method to strengthen the interface bonding of the composites. The satisfactory mechanical properties of the composites were mainly attributed to the superior interfacial adhesion. On the one hand, TA could play a role in refining Ni grain during electrodeposition. On the other hand, the hydroxyl groups attached to composite coating, which were introduced by TA, could react with the RPU matrix to form chemical bonds. When the composites were under stress, the chemical bonds could effectively transfer the stress from matrix to the interface, while the refined Ni crystals could greatly increase the stress transfer path, and thus improve the strength and toughness of the material. Compared with pure RPU, the tensile strength, bending strength，interlaminar shear strength, and impact strength of TA‐Ni‐coated CFs/RPU composites were improved by 14.8%, 83.1%, 28.7%, and 121.4%, respectively.

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“…Pure iron has an excellent plasticity, impact toughness and electromagnetic properties, and is used widely in biology, electronics, aerospace and other fields [1][2][3]. However, during the cutting of pure iron, large deformations and work-hardening phenomena occur.…”

Section: Introductionmentioning

confidence: 99%

Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment

Kong

Song

et al. 2020

Materials

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To investigate the mechanism of surface modification of pure iron by atmospheric pressure plasma treatment (APPT), the surface wettability of pure iron was characterized by using a contact-angle measuring instrument, and the mechanical properties of pure iron were measured by a tensile testing machine and nanoindentation instrument. Molecular dynamics simulations were used to explain the modification mechanism of the surface wettability and the mechanical behavior of pure iron by APPT. The experimental results show that pure iron treated by APPT is superhydrophilic, with reduced tensile strength and surface hardness. This result agrees with the molecular dynamics simulation, which shows that the pure iron material hydrophilicity improved after APPT. The behavior was attributed to the formation of hydrogen bonds on the surface of the pure iron after APPT. The surface binding energy of the pure iron material increased between the water molecule and the residual N atom that was induced by APPT. The N atom that was introduced by the APPT led to Fe bond fracture, and the N atom reduced the Fe bond strength, which resulted in a reduction of material yield strength and microhardness.

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Accelerated biodegradation and improved mechanical performance of pure iron through surface grain refinement

Cited by 40 publications

References 65 publications

Effects of Conventional and Severe Shot Peening on Residual Stress and Fatigue Strength of Steel AISI 1060 and Residual Stress Relaxation Due to Fatigue Loading: Experimental and Numerical Simulation

Effects of Conventional and Severe Shot Peening on Residual Stress and Fatigue Strength of Steel AISI 1060 and Residual Stress Relaxation Due to Fatigue Loading: Experimental and Numerical Simulation

Strength and toughness of carbon fibers reinforced rigid polyurethane composites by adsorbing tannic acid and refining Ni grains on carbon fibers surface

Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment

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