Makale detayı · 2025
Influence of heat treatments and hot isostatic processes (HIP) on microstructure and mechanical behavior of Ti-6Al-4V alloy produced by Powder Bed Fusion Using Electron Beam (PBF-EB)
KOVOVE MATERIALY-METALLIC MATERIALS
- Yıl
- 2025
- ISSN
0023-432X- Tür
- article
Veri kaynağı ayrımı
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Özet
İngilizce (OpenAlex)
This study investigates the effects of heat treatments and hot isostatic pressing (HIP) on the microstructure and mechanical behavior of Ti-6Al-4V parts manufactured by electronbeam powder bed fusion.Solution treatment at 950 • C, followed by aging at 500-600 • C, did not alter porosity.Aging increased the α-phase ratio and compensated for the strength reduction induced by ST.All HIP cycles significantly reduced pore size and pore count, with the 800 • C/200 MPa cycle yielding the highest average relative density of 99.86 %, resulting in a maximum yield strength of 948 MPa and a maximum ultimate tensile strength of 1013 MPa.An 800 • C/200 MPa HIP cycle increased ductility while maintaining strength, owing to limited α-lath coarsening.Super-transus HIP at 1050 • C/100 MPa transformed columnar β grains into equiaxed structures, causing significant α-lath coarsening, a loss of mechanical strength, and increased anisotropy.These findings emphasize the need to optimize post-processing to balance porosity elimination, microstructural refinement, and mechanical performance in Ti-6Al-4V components.K e y w o r d s : additive manufacturing, Powder Bed Fusion Using Electron Beam (PBF-EB), Ti-6Al-4V, heat treatment, hot isostatic pressing
Konular
- Additive Manufacturing Materials and Processes
- Titanium Alloys Microstructure and Properties
- Surface Treatment and Residual Stress
Birincil konu Additive Manufacturing Materials and Processes