Microstructural evolution of near-β Ti-6Zr-5Fe alloy fabricated by selective laser melting before and after solution treatment

2021 ◽  
Vol 862 ◽  
pp. 158496
Author(s):  
Peng Qi ◽  
Bolong Li ◽  
Tongbo Wang ◽  
Lian Zhou ◽  
Zuoren Nie
Keyword(s):  
Selective Laser Melting ◽  
Microstructural Evolution ◽  
Solution Treatment ◽  
Laser Melting ◽  
Before And After

Microstructural Evolution and Tensile Property of Hastelloy-X Alloys Produced by Selective Laser Melting

2017 ◽  
Vol 44 (2) ◽  
pp. 0202007
Author(s):  
侯慧鹏 Hou Huipeng ◽  
梁永朝 Liang Yongchao ◽  
何艳丽 He Yanli ◽  
李雅莉 Li Yali ◽  
雷力明 Lei Liming
Keyword(s):  
Selective Laser Melting ◽  
Tensile Property ◽  
Microstructural Evolution ◽  
Laser Melting ◽  
Hastelloy X

scholarly journals Hydrogen Embrittlement Behavior of 18Ni 300 Maraging Steel Produced by Selective Laser Melting

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2360 ◽  
Author(s):  
Young Jin Kwon ◽  
Riccardo Casati ◽  
Mauro Coduri ◽  
Maurizio Vedani ◽  
Chong Soo Lee
Keyword(s):  
Hydrogen Embrittlement ◽  
Maraging Steel ◽  
Selective Laser Melting ◽  
Solution Treatment ◽  
Tensile Tests ◽  
Constant Current ◽  
Hydrogen Atoms ◽  
Laser Melting ◽  
Constant Current Density ◽  
Hydrogen Charging

A study was performed to investigate the hydrogen embrittlement behavior of 18-Ni 300 maraging steel produced by selective laser melting and subjected to different heat treatment strategies. Hydrogen was pre-charged into the tensile samples by an electro-chemical method at the constant current density of 1 A m−2 and 50 A m−2 for 48 h at room temperature. Charged and uncharged specimens were subjected to tensile tests and the hydrogen concentration was eventually analysed using quadrupole mass spectroscopy. After tensile tests, uncharged maraging samples showed fracture surfaces with dimples. Conversely, in H-charged alloys, quasi-cleavage mode fractures occurred. A lower concentration of trapped hydrogen atoms and higher elongation at fracture were measured in the H-charged samples that were subjected to solution treatment prior to hydrogen charging, compared to the as-built counterparts. Isothermal aging treatment performed at 460 °C for 8 h before hydrogen charging increased the concentration of trapped hydrogen, giving rise to higher hydrogen embrittlement susceptibility.

A study of the microstructural evolution during selective laser melting of Ti–6Al–4V

2010 ◽  
Vol 58 (9) ◽  
pp. 3303-3312 ◽  
Author(s):  
Lore Thijs ◽  
Frederik Verhaeghe ◽  
Tom Craeghs ◽  
Jan Van Humbeeck ◽  
Jean-Pierre Kruth
Keyword(s):  
Selective Laser Melting ◽  
Microstructural Evolution ◽  
Laser Melting

Effects of vacuum annealing treatment on microstructures and residual stress of AlSi10Mg parts produced by selective laser melting process

2016 ◽  
Vol 30 (19) ◽  
pp. 1650255 ◽  
Author(s):  
Tian Chen ◽  
Linzhi Wang ◽  
Sheng Tan
Keyword(s):  
Residual Stress ◽  
Tensile Strength ◽  
Selective Laser Melting ◽  
Vacuum Annealing ◽  
Annealing Treatment ◽  
Melting Process ◽  
Second Phase ◽  
Laser Melting ◽  
Heat Treated ◽  
Before And After

Selective laser melting (SLM)-fabricated AlSi10Mg parts were heat-treated under vacuum to eliminate the residual stress. Microstructure evolutions and tensile properties of the SLM-fabricated parts before and after vacuum annealing treatment were studied. The results show that the crystalline structure of SLM-fabricated AlSi10Mg part was not modified after the vacuum annealing treatment. Additionally, the grain refinement had occurred after the vacuum annealing treatment. Moreover, with increasing of the vacuum annealing time, the second phase increased and transformed to spheroidization and coarsening. The SLM-produced parts after vacuum annealing at 300[Formula: see text]C for 2 h had the maximum ultimate tensile strength (UTS), yield strength (YS) and elongation, while the elastic modulus decreased significantly. In addition, the tensile residual stress was found in the as-fabricated AlSi10Mg samples by the microindentation method.

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