Strength properties of annealed austenitic stainless steels are relatively low and therefore improvements desired for constructional applications. The reversion deformation induced martensite to fine-grained austenite has been found be an efficient method increase significantly the yield strength metastable without impairing much their ductility. Research conducted during thirty years in many research groups so that features process enhanced reported numerous papers. This review covers main...

The as-built selective laser melted (SLM) austenitic stainless steel 316 L components are characterized by presence of quality related concerns such as tensile residual stresses, poor surface finish, etc. These issues may prove to be detrimental during the actual usage and could result in mechanical performance. Therefore, it is important perform apt post processing heat treatment shot peening tailor problems facilitate improved In present work, additively manufactured (AM) samples were...

In the field of additive manufacturing, design and fabrication lattice structures have garnered substantial attention, particularly for their potential in advanced material applications. This study focuses on mechanical properties titanium alloy Ti64 fabricated by Laser Powder Bed Fusion. It examines features two structure types, TPMS Gyroid Stochastic Voronoi, analyzing interplay. To evaluate properties, methodologies to compute stress were employed: Method A, nominal diameter calculations...

In this study, the enhancement of additively manufactured (AM) 316L, by annealing, to fully reversed tension-compression fatigue performance, in terms life and damage, were investigated under two conditions: as-built (AB) heat-treated (HT) at 900 °C. The underlying mechanisms comprehensively characterised through intensive microstructural observations cyclic-strained microstructures fracture surfaces using laser confocal scanning microscopy (LCSM) secondary electron imaging (SEM)....

This study investigates various processing approaches, interface characteristics, and mechanical properties of an aluminum (Al) matrix composite reinforced with additively manufactured (AM) 316L stainless-steel (SS) lattice. The AM-316L-SS lattice, boasting a 30 % infill density, was fabricated using the laser powder bed fusion technique. Al-matrix integrated reinforcement through experimentation involving pre-stirring molten Al under pressurized unpressurized die-casting conditions. A...

In this study, a new non-equiatomic and cost-effective high-entropy alloy (HEA), Al8Cr12Mn25Fe35Ni20, was designed using thermodynamic parameters prepared by arc melting. The subjected to homogenization at 1200 °C hot-rolling reduction of 50%. hot deformation behavior mechanism were studied varying strain rates ranging from 0.01 10 s−1 temperatures 900° 1100°C via plane compression tests Gleeble 3800 thermo-mechanical simulator. phase structure the rolled electron backscattered diffraction...

In this study, a post-weld heat treatment (PWHT) at high temperature of 700 °C for 10 min was proposed to significantly improve the mechanical performance dissimilar laser-welded butt joints between medium-manganese stainless steel (MMn-SS) and high-strength carbon steels (HS-CS) as base metals (BMs). Electron backscatter diffraction transmission electron microscopy were employed characterise microstructures study deformation mechanisms in paired during PWHT tensile straining....

As base metals (BMs), plates of 5-mm-thick low-alloyed ultra-high-strength carbon steel (LA-UHSS) with a tensile strength 1.3 GPa and 316L austenitic stainless were laser-welded at two different energy inputs (EIs; 60 100 J/mm). The microstructural characteristics the fusion zones (FZs) in welded joints examined using electron backscattering diffraction (EBSD) transmission microscopy. fine components, such as prior austenite grain size (PAGS) effective fresh martensite promoted during...

This study investigated the post-processing of laser powder bed fusion (LPBF) built 316 L stainless steel components to address quality-related issues such as dangerous residual stresses and poor surface finish. Two different heat treatments (HT) at 600°C 900°C, followed by severe shot peening (SSP), were employed mitigate these concerns. The impact on roughness, stresses, microhardness, microstructure in both as-printed post-processed states was examined. Results indicate that HT fails...

Auxetic structures, characterized by showing negative Poisson's ratio (ʋ) when loaded, are cellular metamaterials consisting of connected struts in repeating unit cells. The mechanical behavior auxetics depends on dimensions the cell such as height and length cell, strut thickness (St), orientation angle (θ) struts. present study investigates effects variations St θ ʋ stiffness (E) additively manufactured 316L stainless steel with re-entrant honeycomb fabricated laser powder bed fusion...

Severe shot peening (SSP) was used on additive manufactured 316L by laser powder bed fusion. The effect of the post processing surface features material analyzed through residual stress measurements, tensile testing, hardness-depth profiles, and fatigue testing flexural bending. results showed that SSP can be utilized to form stresses up −400 MPa 200 μm below surface. At same time, a clear improvement hardness achieved from 275 HV near 650 HV. These together resulted in strength which...

In the present study, hydrogen embrittlement (HE) susceptibility of an additively manufactured (AM) 316L stainless steel (SS) was investigated. The materials were fabricated in form a lattice auxetic structure with three different strut thicknesses, 0.6, 1, and 1.4 mm, by laser powder bed fusion technique at volumetric energy 70 J·mm-3. effect H charging on strength ductility structures evaluated conducting tensile testing H-charged specimens slow strain rate 4 × 10-5 s-1. Hydrogen...

High-pressure torsion (HPT) processing was applied to cast pure magnesium, and the effects of deformation on microstructure, hardness, tensile properties corrosion resistance were evaluated. The microstructures processed samples examined by electron backscatter diffraction, mechanical determined Vickers hardness testing. studied using electrochemical impedance spectroscopy in a 3.5% NaCl solution. results show that HPT effectively refines grain size Mg from millimeters structure few...

Additive manufacturing (AM) is an emerging fabrication technology that offers unprecedented potential for end-to-end complex shape customized products. However, building products with high performance by AM presents a technological challenge. Inadequate processing parameters, environment or changes in powder properties may lead to defect density the part and poor mechanical properties. Microstructure, structure, of AISI 316L stainless steel pieces, additively manufactured laser bed fusion...

Solid-state welding (SSW) is a relatively new technique, and ongoing research being performed to fulfill design demands, deal with contemporary material advancements, overcome defects associated traditional techniques. This work provides an in-depth examination of the advancements in solid-state steels through diffusion bonding (DB) friction stir (FSW). Considerable attention was given DB steel, which overcame difficulties segregation, cracking, distortion stresses that are usually formed...

Purpose This study compares the fatigue performance and biocompatibility of as-built chemically etched Ti-6Al-4V alloys in TPMS-gyroid stochastic structures fabricated via Powder Bed Fusion Laser Beam (PBF-LB). aims to understand how complex lattice post-manufacturing treatment, particularly chemical etching, affect mechanical properties, surface morphology, resistance these metamaterials for biomedical applications. Design/methodology/approach Selective Melting (SLM) technology was used...

Titanium-based lattice structures have gained significant attention in biomedical engineering due to their potential mimic bone-like behavior and improve implant performance. This study evaluates the performance of bio-inspired Ti64 TPMS Gyroyd Stochastic fabricated via Powder Bed Fusion-Laser Beam (PBF-LB), focusing on in-vivo ex-vivo mechanical biological responses for applications. Utilizing an SLM 280 HL printer, samples exhibited notable geometric accuracy essential integrity. The...

In this paper, the effect of printing parameters on surface roughness and mechanical properties wire arc additive manufactured (WAAM) carbon steel is evaluated. WAAM has become increasingly popular as an manufacturing method, particularly for producing large parts. Utilizing welding equipment with cold metal transfer (CMT) technology in production ensures high-quality However, play a crucial role determining material properties. This study evaluates impact five different these Microhardness...