The Effect of Localized Vibration during Welding on the Microstructure and Mechanical Behavior of Steel Welds

Ingram, Ehud; Golan, Oz; Haj-Ali, Rami; Eliaz, Noam

doi:10.3390/ma12162553

Cited by 18 publications

(9 citation statements)

References 15 publications

(18 reference statements)

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“…However, these properties depend to some extent on the material selected, process settings, and part shape [ 37 ]. The use of digital image correlation (DIC) with tension tests [ 36 , 64 , 65 ] is recommended for measurement of the static mechanical properties, while dynamic pulse-echo ultrasonic non-destructive test (NDT) with a time-of-flight (TOF) sound velocity analysis is recommended for measurement of the elastic constants [ 36 ].…”

Section: Discussionmentioning

confidence: 99%

Comparative Quality Control of Titanium Alloy Ti–6Al–4V, 17–4 PH Stainless Steel, and Aluminum Alloy 4047 Either Manufactured or Repaired by Laser Engineered Net Shaping (LENS)

et al. 2020

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Additive manufacturing attracts much interest for manufacturing and repair of structural parts for the aerospace industry. This paper presents comparative characterization of aircraft items made of Al 4047 alloy, Ti-6Al-4V alloy, and 17-4 precipitation hardened (PH) (AISI 630) stainless steel, either manufactured or repaired by laser engineered net shaping (LENS). Chemical analysis, density, and surface roughness measurements, X-ray micro-computed tomography (μ-CT) analysis, metallography, and micro-hardness testing were conducted. In all three materials, microstructures typical of rapid solidification were observed, along with high density, chemical composition, and hardness comparable to those of the counterpart wrought alloys (even in hard condition). High standard deviation in hardness values, anisotropic geometrical distortion, and overbuild at top edges were observed. The detected defects included partially melted and unmelted powder particles, porosity, and interlayer lack of fusion, in particular at the interface between the substrate plate and the build. There was a fairly good match between the density values measured by μ-CT and those measured by the Archimedes method; there was also good correlation between the type of defects detected by both techniques. Surface roughness, density of partially melted powder particles, and the content of bulk defects were significantly higher in Al 4047 than in 17-4 PH stainless steel and Ti-6Al-4V alloy. Optical gaging can be used reliably for surface roughness measurements. The implications of these findings are discussed.

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Section: Discussionmentioning

confidence: 99%

Comparative Quality Control of Titanium Alloy Ti–6Al–4V, 17–4 PH Stainless Steel, and Aluminum Alloy 4047 Either Manufactured or Repaired by Laser Engineered Net Shaping (LENS)

et al. 2020

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“…2 c) exhibits characteristic peaks at 3367 cm −1 , 2879 cm −1 , and 1570 cm −1 corresponding to O–H stretching, C–H symmetric and asymmetric stretching, and NH bending of the primary amine, respectively 42 . Notably, bands at 1645 (CO stretching of amide I) and 1550 (NH bending of amid II) are not visible, probably due to overlapping with others 44 . The CH 2 bending and CH 3 symmetrical deformations (C–O stretching vibration of CH 2 OH groups) are detected at around 1462 cm −1 and 1377 cm −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Controlled biodegradation of magnesium alloy in physiological environment by metal organic framework nanocomposite coatings

Khalili

Tamjid

2021

Sci Rep

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Magnesium-based implants (MBIs) have recently attracted great attention in bone regeneration due to elastic modulus similar to bone. Nevertheless, the degradation rate and hydrogen release of MBIs in the body have to be tackled for practical applications. In the present study, we present a metal–organic framework (MOF) nanoplates to reduce the degradation rate of AZ91 magnesium alloy. Zeolitic imidazolate frameworks (ZIF-8) with a specific surface area of 1789 m2 g−1 were prepared by solvothermal methods, and after dispersion in a chitosan solution (10% w/w), the suspension was electrospun on the surface of AZ91 alloy. Studying the degradation rate in simulated body fluid (SBF) by electrochemical analysis including potentiodynamic polarization and electrochemical impedance spectroscopy reveals that the degradation rate of the surface-modified implants decreases by ~ 80% as compared with the unmodified specimens. The reduced alkalization of the physiological environment and hydrogen release due to the implant degradation are shown. In vitro studies by fibroblasts and MG63 osteosarcoma cells exhibit improved cell adhesion and viability. The mechanisms behind the improved degradation resistance and enhanced bioactivity are presented and discussed. Surface modification of MBIs by MOF-chitosan coatings is a promising strategy to control the biodegradation of magnesium implants for bone regeneration.

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“…Two different vibration setups i.e., local vibration effect (LVE) and global vibration effect (GVE), and the effect of these vibration setups on the mechanical properties and microstructural behaviour was investigated. Authors found that GVE has a significant effect on the microstructure and mechanical properties compared to LVE [12].…”

Section: Literature Review 21the Effect Of Vibratory Assisted Welding (Vaw)mentioning

confidence: 99%

The effect of post-weld heat-treatment (PWHT) and vibratory assisted welding (VAW) on hardness of 304L stainless steels material

Naidu¹,

Padal²

2021

IJATEE

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Welding is the most common and frequently used method to join the components. The Fusion welding process is the one that is a commonly used method to join 304L stainless steel materials. The Fusion welding process generates much residual stresses within the materials. Residual stresses can be modified by a few techniques like preheating post-weld heat treatment but it takes more time and requires specific tools. Vibratory assisted welding is introduced to reduce welding defects. In th is, a comparative study has been carried between post-weld heat treatment and vibratory assisted welding for the hardness of 304L stainless steel. From the test results, PWHT and vibratory assisted welding are two effective methods to increase the hardness of the weldments. 13% and 18% improvement in the hardness of 304L stainless is observed in the case of PWHT and vibratory assisted welding, respectively, to the conventional welding. Even though both PWHT and VAW as exhibiting almost similar results PWHT processes are more time-consuming, costly, and Laborious. From the current research, it is identified Vibratory assisted welding is the best suitable technique for reducing weld defects and enhancing properties.

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The Effect of Localized Vibration during Welding on the Microstructure and Mechanical Behavior of Steel Welds

Cited by 18 publications

References 15 publications

Comparative Quality Control of Titanium Alloy Ti–6Al–4V, 17–4 PH Stainless Steel, and Aluminum Alloy 4047 Either Manufactured or Repaired by Laser Engineered Net Shaping (LENS)

Comparative Quality Control of Titanium Alloy Ti–6Al–4V, 17–4 PH Stainless Steel, and Aluminum Alloy 4047 Either Manufactured or Repaired by Laser Engineered Net Shaping (LENS)

Controlled biodegradation of magnesium alloy in physiological environment by metal organic framework nanocomposite coatings

The effect of post-weld heat-treatment (PWHT) and vibratory assisted welding (VAW) on hardness of 304L stainless steels material

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