Microanalysis of crystallographic characteristics and structural transformations in SPDed Al Mn Si alloy by dual-straining

Pouraliakbar, Hesam; Jandaghi, Mohammad Reza; Baygi, Seyyed Javad Mohammadi; Khalaj, Gholamreza

doi:10.1016/j.jallcom.2016.12.086

Cited by 76 publications

(9 citation statements)

References 14 publications

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“…The grains in the WZ of the laser beam welded joint have stronger diffraction peaks and smaller half-width in the crystal index of 1012 À Á , 1110 À Á and 1013 À Á indicating a coarser grain size. Meanwhile, the diffraction peaks of the laser-MIG hybrid welds slightly shifted to the right, suggesting that there was a considerable extent of internal stress or lattice distortion in the joint [32]. This large stress or lattice distortion can be related to the formation of twins in the welded joints.…”

Section: X-ray Diffractionmentioning

confidence: 97%

Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes

Zhang

Sun

et al. 2018

Int J Adv Manuf Technol

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In this study, in order to achieve a better understanding of the strengthening mechanism in the commercially pure (CP) Ti welds, autogenously laser beam and laser-MIG hybrid welding of 4.2 mm thick CP-Ti plates were performed and the correlation between microstructure, texture distribution and the mechanical properties were systematically investigated. Microstructural coarsening and increase in microhardness were observed in the HAZ and WZ. The tensile test results suggested the base metal was the weak point of the joint for both welding conditions. The EBSD observations confirmed that a large number of 1012 È É and 1122 È É twin grains occurred in the HAZ and WZ of both welded joints, while a higher concentration of these twin grains were found in the laser-MIG hybrid joints. High concentration of the twin grain boundaries can act as barrier to stop dislocation slip during deformation and therefore contribute to the strengthening of the welds. The existence of very small twin grains and acicular α phase in HAZ and WZ would equivalently reduce the averaged grain size and therefore induce an increase in strength based on Hall-Petch's law. In addition, the averaged Schmid factor of BM is higher than that of the WZ and HAZ in both welding joints suggesting that the grain boundary sliding will take place preferably in BM during deformation so that the necking and fracture occurred in base metal during tensile tests of both welding joint specimens.

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Section: X-ray Diffractionmentioning

confidence: 97%

Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes

Zhang

Sun

et al. 2018

Int J Adv Manuf Technol

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“…28 Variation in micro strain and dislocation line density in terms of ion dose are shown in the Figures 5 and 6, respectively, for all the three planes. 29 In both Figures 5 and 6, plane (1 1 1) and plane (2 0 0), abrupt changes occur at the initial ion doses, but behavior of plane (2 0 0) strain increases in start and at the final ion dose, all the planes value comes closer in the end.…”

Section: Resultsmentioning

confidence: 85%

Study of the effects of Ni⁺ ion implantation on morphology, structure, hardness, and electrical conductivity of brass

Shahnawaz

2021

Surface & Interface Analysis

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Funding information Higher Education Commission of PakistanIn this study, nickel ions were implanted in brass at 2.0-MeV energy doses ranging from 1.9 × 10 14 , 4.8 × 10 14 , and 1.0 × 10 15 ions cm −2 at room temperature. Formation of micro size particle cluster, crater, void, rust, and flower-like structure were observed in scanning electron microscope (SEM) micrographs. XRD patterns explain the plane (1 1 1) and plane (2 2 0) under abrupt fluctuations, but in plane (2 0 0), systematic changes occur after ion implantation. Modifications in crystallite size, lattice strain, and dislocation density were discussed. In all the implanted specimens, values of hardness were smaller as compared with the unimplanted one.Precise changes occurred in the value of d-spacing that produced alteration in electrical conductivity at the initial ion doses. Therefore, electrical conductivity values were changed from 3.980E 6 (S/m) to 2.966E 7 (S/m). Further increment in the ion dose, electrical conductivity reduced to recover its value. Initial trend of hardness and electrical conductivity was nonlinear, but both tend to recuperate their values in the end. In FT-IR spectra, three new bands were formed at 1261, 1417, and 1455 cm −1 after ion implantation that was due to change in bonding of brass.

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“…The XRD graph confirms that the intensity of the diffraction lines of Figure 5 c is decreased with a larger width when compared to other Zn composites (0.5 g/L) and pure Zn coating. Williamson-Hall and Sherrer’s method can be applied to determine the crystallite size [ 4 , 70 ]. The present work used the Sherrer’s method to determine the average crystal size of deposits as plated Zn and Zn–WO 3 composites (Equation (1)).…”

Section: Resultsmentioning

confidence: 99%

The Effect of Zn and Zn–WO3 Composites Nano-Coatings Deposition on Hardness and Corrosion Resistance in Steel Substrate

Kumar

Chandrashekarappa

Kulkarni³

et al. 2021

Materials

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Pure Zn (Zinc) and its Zn–WO3 (Zinc–Tungsten trioxide) composite coatings were deposited on mild steel specimens by applying the electrodeposition technique. Zn–WO3 composites were prepared for the concentration of 0.5 and 1.0 g/L of particles. The influence of WO3 particles on Zn deposition, the surface morphology of composite, and texture co-efficient were analyzed using a variety of techniques, such as X-ray diffraction (XRD) and scanning electron microscopy (SEM) with Energy Dispersive X-ray analysis (EDX). Higher corrosion resistance and microhardness were observed on the Zn–WO3 composite (concentration of 1.0 g/L). The higher corrosion resistance and microhardness of 1.0 g/L Zn–WO3 nanocomposite coatings effectively protect the steel used for the manufacture of products, parts, or systems from chemical or electrochemical deterioration in industrial and marine ambient environments.

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Microanalysis of crystallographic characteristics and structural transformations in SPDed Al Mn Si alloy by dual-straining

Cited by 76 publications

References 14 publications

Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes

Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes

Study of the effects of Ni⁺ ion implantation on morphology, structure, hardness, and electrical conductivity of brass

The Effect of Zn and Zn–WO3 Composites Nano-Coatings Deposition on Hardness and Corrosion Resistance in Steel Substrate

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Microanalysis of crystallographic characteristics and structural transformations in SPDed Al Mn Si alloy by dual-straining

Cited by 76 publications

References 14 publications

Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes

Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes

Study of the effects of Ni+ ion implantation on morphology, structure, hardness, and electrical conductivity of brass

The Effect of Zn and Zn–WO3 Composites Nano-Coatings Deposition on Hardness and Corrosion Resistance in Steel Substrate

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Study of the effects of Ni⁺ ion implantation on morphology, structure, hardness, and electrical conductivity of brass