Results 51 to 60 of about 5,650 (217)

In-situ microstructure control by laser post-exposure treatment during laser powder-bed fusion

Additive Manufacturing Letters, 2023
In-situ microstructure control is an important feature of laser powder-bed fusion (LPBF) that enables the tailoring of the mechanical behaviour of additively manufactured metallic parts.
Mahyar Hasanabadi, Ali Keshavarzkermai, Hamed Asgari, Nadia Azizi, Adrian Gerlich, Ehsan Toyserkani   +5 more
doaj   +1 more source

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

Advanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira, Marcella Gaute Cavalcante Xavier, Abdoul‐Aziz Bogno, Piter Gargarella, José Eduardo Spinelli   +4 more
wiley   +1 more source

Cracking during thermal post-processing of laser powder bed fabricated CM247LC Ni-superalloy

Materials & Design, 2019
The causes of cracking during thermal post-processing of laser powder bed fabricated (LPBF) CM247LC Ni-superalloy have been examined. Micro-hardness measurements and microstructural analyses were undertaken following short aging heat treatments around ...
John H. Boswell, Daniel Clark, Wei Li, Moataz M. Attallah   +3 more
doaj   +1 more source

Selective laser oxidation sintering of cuprous oxide

Materials Letters: X, 2023
Laser powder bed fusion (LPBF) has revolutionized many industries. In this paper, we report a new approach of LPBF for oxide ceramics with selective oxidation that reduces cracks and manufacturing defects. In this method, laser energy density was used to
Asif Ur Rehman, Abid Ullah, Tingting Liu, Rashid Ur Rehman, Metin Uymaz Salamci, Wenhe Liao   +5 more
doaj   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

Achieving high strength-ductility synergy via layer-wise heterogeneous structure of additively manufactured reduced activation ferrite/martensite steel

Materials Research Letters
The next generation of advanced fusion reactors requires high-performance reduced activation ferrite/martensite (RAFM) steel parts. Here, we propose a new process strategy to achieve high strength-ductility synergy of RAFM steel fabricated by laser ...
Zhenyu Chen, Yuhao Zhuo, Yuang Cheng, Yu Song, Zhixin Xia, Chengqi Lu, Xing Zhu, Chuanyang Wang, Qingbo Jia   +8 more
doaj   +1 more source

Precipitation Simulations of the O‐Phase in Ti2AlNb Alloys Processed by Laser Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Simulated and experimental evolution of the O‐phase volume fraction during postprocessing of a Ti‐21Al‐25Nb (at.%) alloy processed by laser powder bed fusion. With results of sensitivity to input parameters from a thorough and quantified analysis, the interfacial energy matrix/precipitate is the most relevant input parameter for the simulation of the O‐
Silvana Tumminello, Joachim Gussone, Suzana G. Fries, Marcus Rackel, Andreas Stark, Norbert Schell, Jan Haubrich, Guillermo Requena   +7 more
wiley   +1 more source

Fluctuations of Tracks and Layers during Aluminium Laser Powder-Bed Fusion

Applied Sciences, 2021
Laser Powder-Bed Fusion (LPBF) is one method in Additive Manufacturing where layer-wise complex structures can be built. However, although the LPBF machines produce promising parts, the efficiency and process speed are typically still low, which can make
Joerg Volpp, Filippo Belelli, Riccardo Casati   +2 more
doaj   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

Remarkable strengthening effects of cells in laser powder bed fusion-processed Inconel 718

Materials Research Letters
Alloys fabricated via laser powder bed fusion (LPBF) exhibit superior strength. This study investigates the individual strengthening effects of the nanometre-sized cellular and micrometre-sized crystallographic lamellar structures in the LPBF-fabricated ...
Taichi Kikukawa, Takuya Ishimoto, Hyoung Seop Kim, Takayoshi Nakano   +3 more
doaj   +1 more source