An investigation into microstructure and high-temperature mechanical properties of selective laser-melted 316L stainless steel toward the development of hybrid Ampliforge process

Habibiyan, Armin; Hanzaki, A Zarei; Abedi, H.R.

doi:10.1007/s00170-020-05870-1

Cited by 19 publications

(3 citation statements)

References 31 publications

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“…Similar results were observed by Yu et al, who subjected the Ti-6Al-V alloy to HIP treatment [6]. Additional research efforts have aimed at improving the mechanical properties of laser powder bed fabricated (LPBF) alloys using AmpliFORGE™ [7] and shot peening [8] techniques, which can reduce porosity/residual stresses and/or prolong fatigue life.…”

Section: Introductionsupporting

confidence: 74%

Effects of equal channel angular pressing and heat treatments on the microstructures and mechanical properties of selective laser melted and cast AlSi10Mg alloys

Snopiński

Król

Pagáč

et al. 2021

Archiv.Civ.Mech.Eng

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This study investigated the impact of the equal channel angular pressing (ECAP) combined with heat treatments on the microstructure and mechanical properties of AlSi10Mg alloys fabricated via selective laser melting (SLM) and gravity casting. Special attention was directed towards determining the effect of post-fabrication heat treatments on the microstructural evolution of AlSi10Mg alloy fabricated using two different routes. Three initial alloy conditions were considered prior to ECAP deformation: (1) as-cast in solution treated (T4) condition, (2) SLM in T4 condition, (3) SLM subjected to low-temperature annealing. Light microscopy, transmission electron microscopy, X-ray diffraction line broadening analysis, and electron backscattered diffraction analysis were used to characterize the microstructures before and after ECAP. The results indicated that SLM followed by low-temperature annealing led to superior mechanical properties, relative to the two other conditions. Microscopic analyses revealed that the partial-cellular structure contributed to strong work hardening. This behavior enhanced the material’s strength because of the enhanced accumulation of geometrically necessary dislocations during ECAP deformation.

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Section: Introductionsupporting

confidence: 74%

Effects of equal channel angular pressing and heat treatments on the microstructures and mechanical properties of selective laser melted and cast AlSi10Mg alloys

Snopiński

Król

Pagáč

et al. 2021

Archiv.Civ.Mech.Eng

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“…Higher performance levels have been shown to be achieved by combining AM with conventional postprocessing methods. For example, Arconic has introduced the AmpliforgeTM process [ 10 ]. This is a hybrid technology that combines the benefits of additive manufacturing and advanced forging processes to produce stronger, tougher parts with less time, cost, and material waste.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behaviour of Additively Manufactured 18Ni-300 Maraging Steel

et al. 2023

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In this article, hot compression tests on the additively produced 18Ni-300 maraging steel 18Ni-300 were carried out on the Gleeble thermomechanical simulator in a wide temperature range (900–1200 °C) and at strain rates of 0.001 10 s−1. The samples were microstructurally analysed by light microscopy and scanning electron microscopy with electron backscatter diffraction (EBSD). This showed that dynamic recrystallization (DRX) was predominant in the samples tested at high strain rates and high deformation temperatures. In contrast, dynamic recovery (DRV) dominated at lower deformation temperatures and strain rates. Subsequently, the material constants were evaluated in a constitutive relationship using the experimental flow stress data. The results confirmed that the specimens are well hot workable and, compared with the literature data, have similar activation energy for hot working as the conventionally fabricated specimens. The findings presented in this research article can be used to develop novel hybrid postprocessing technologies that enable single-stage net shape forging/forming of AM maraging steel parts at reduced forming forces and with improved density and mechanical properties.

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“…It is usually conducted at temperatures 35 -200 ⁰C, however, it is proven that the higher preheating temperatures > 100 ⁰C have an unfavorable effect on the Si cellular network [58] [59], since the cooling rate is an important factor determining the formation of cellular structure and λ microstructural scale size [46]. Some efforts have also been made to improve the mechanical properties of LPBF alloys using hybrid technologies combining metal AM and conventional plastic deformation processes, like Hot Isostatic Pressing (HIP) [60] [61] or AmpliFORGE TM [62]. Also, shot peening [63] [64] is frequently used as a post-AM procedure aimed to reduce porosity/residual stresses and enhance fatigue life.…”

mentioning

confidence: 99%

Mechanical and Tibological Properties of SLM AlSi10Mg Alloy Subjected to ECAP

Snopiński

Woźniak

Król

2021

SSP

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In this study, selectively laser melted AlSi10Mg alloy was subjected to ECAP processing for the first time. Mechanical properties of the ECAP processed samples were compared based on hardness measurement, compression and wear tests. The results showed exceptional synergy of high yield strength ~382 MPa and strain to failure of ~48% of the SLM ECAP processed sample. This sample also offered approximately ~71% higher wear resistance, than an unprocessed one. The proposed novel route expands the opportunities of both technologies to produce materials with exceptional properties.

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An investigation into microstructure and high-temperature mechanical properties of selective laser-melted 316L stainless steel toward the development of hybrid Ampliforge process

Cited by 19 publications

References 31 publications

Effects of equal channel angular pressing and heat treatments on the microstructures and mechanical properties of selective laser melted and cast AlSi10Mg alloys

Effects of equal channel angular pressing and heat treatments on the microstructures and mechanical properties of selective laser melted and cast AlSi10Mg alloys

Hot Deformation Behaviour of Additively Manufactured 18Ni-300 Maraging Steel

Mechanical and Tibological Properties of SLM AlSi10Mg Alloy Subjected to ECAP

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