Fracture Toughness of a Hot Work Tool Steel Fabricated by Laser‐Powder Bed Fusion Additive Manufacturing

2019 ◽  
Vol 91 (5) ◽  
pp. 1900449 ◽  
Author(s):  
Massimo Pellizzari ◽  
Sebastiano Furlani ◽  
Faraz Deirmina ◽  
Raveendra Siriki ◽  
Bandar AlMangour ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Additive Manufacturing ◽  
Tool Steel ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Hot Work Tool Steel

scholarly journals Evaluation of post-treatments of novel hot-work tool steel manufactured by laser powder bed fusion for aluminum die casting applications

2021 ◽  
Vol 800 ◽  
pp. 140305
Author(s):  
A.M. Vilardell ◽  
S.B. Hosseini ◽  
M. Åsberg ◽  
A. Dahl-Jendelin ◽  
P. Krakhmalev ◽  
...  
Keyword(s):  
Tool Steel ◽  
Die Casting ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Hot Work Tool Steel

scholarly journals Hot Work Tool Steel Processed by Laser Powder Bed Fusion: A Review on Most Relevant Influencing Factors

2021 ◽  
Author(s):  
Liang Wu ◽  
Das Suvajeet ◽  
Witalij Gridin ◽  
Stefan Leuders ◽  
Moritz Kahlert ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Tool Steel ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Hot Work Tool Steel

scholarly journals Hot Work Tool Steel Processed by Laser Powder Bed Fusion: A Review on Most Relevant Influencing Factors

2021 ◽  
Vol 23 (7) ◽  
pp. 2170027
Author(s):  
Liang Wu ◽  
Suvajeet Das ◽  
Witalij Gridin ◽  
Stefan Leuders ◽  
Moritz Kahlert ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Tool Steel ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Hot Work Tool Steel

scholarly journals Influence of Different Alloying Strategies on the Mechanical Behavior of Tool Steel Produced by Laser-Powder Bed Fusion

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3344
Author(s):  
Abootorab Baqerzadeh Chehreh ◽  
Anna Strauch ◽  
Felix Großwendt ◽  
Arne Röttger ◽  
Rainer Fechte-Heinen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Tool Steel ◽  
Defect Density ◽  
Steel Powder ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Static Mechanical ◽  
Particle Parameters

Additive manufacturing is a high-potential technique that allows the production of components with almost no limitation in complexity. However, one of the main factors that still limits the laser-based additive manufacturing is a lack of processable alloys such as carbon martensitic hardenable tool steels, which are rarely investigated due to their susceptibility to cold cracking. Therefore, this study aimed to expand the variety of steels for laser powder bed fusion (L-PBF) by investigating an alternative alloying strategy for hot work tool steel powder. In this study, a comprehensive investigation was performed on the powder and L-PBF processed specimen properties and their correlation with the existing defects. Cubical specimens were created using the following two alloying strategies by means of L-PBF: conventional pre-alloyed gas-atomized powder and a mixture of gas-atomized powder with mechanically crushed pure elements and ferroalloys. The influence of the particle parameters such as morphology were correlated to the defect density and resulting quasi-static mechanical properties. Micromechanical behavior and damage evolution of the processed specimens were investigated using in situ computed tomography. It was shown that the properties of the L-PBF processed specimens obtained from the powder mixture performs equal or better compared to the specimens produced from conventional powder.

scholarly journals Effect of Heat Treatment on Microstructure Evolution of X38CrMoV5-1 Hot-Work Tool Steel Produced by L-PBF

2021 ◽  
Author(s):  
Gregorio Carasi ◽  
Bosco Yu ◽  
Esther Hutten ◽  
Hatem Zurob ◽  
Riccardo Casati ◽  
...  
Keyword(s):  
Tool Steel ◽  
Manganese Oxides ◽  
Inner Core ◽  
Solidification Structure ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Hot Work Tool Steel ◽  
Transmission Electron ◽  
Diffraction Patterns

AbstractThe X38CrMoV5-1 hot-work tool steel produced by laser powder bed fusion was investigated to assess the effect of quenching and tempering and direct tempering on the as-built microstructure. After the printing process, the material microstructure appeared to be characterized by a fine cellular network consisting of γ-Fe cell boundaries and α′-Fe cores. Scheil–Gulliver curves, X-ray diffraction patterns, and transmission electron microscopy images suggested a transformation of the inner core zone from δ-Fe to α′-Fe through γ-Fe. Air quenching promoted the transition of the solidification structure into a fully martensitic microstructure. Both as-built and quenched samples revealed the presence of manganese oxides and vanadium carbonitrides forming core-shell structures. After tempering, starting from as-built and from quenched condition, a dispersion of nano-sized V and Cr-rich second phases was formed in the microstructure, achieving hardness values comparable to those obtained by the same alloy produced by conventional methods. The specimen tempered directly after the laser powder bed fusion process showed a hardness peak shifted towards higher temperatures compared to the conventionally tempered sample.

Strengthening mechanisms in a heatvar hot work tool steel fabricated by laser powder bed fusion

2021 ◽  
Vol 805 ◽  
pp. 140801
Author(s):  
Yuan Tian ◽  
Kanwal Chadha ◽  
Sang Hoon Kim ◽  
Clodualdo Aranas
Keyword(s):  
Tool Steel ◽  
Powder Bed Fusion ◽  
Strengthening Mechanisms ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Hot Work Tool Steel

Fracture toughness of 304L austenitic stainless steel produced by laser powder bed fusion

2021 ◽  
Vol 202 ◽  
pp. 114002
Author(s):  
Punit Kumar ◽  
Zhiguang Zhu ◽  
Sharon M.L. Nai ◽  
R.L. Narayan ◽  
U. Ramamurty
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed
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