Morphology, Microstructure, and Mechanical Properties of Fe50-TiC Composite Laser Cladding Layer on Cr12 Mold Steel

2021 ◽  
Vol 58 (7) ◽  
pp. 0714002
Author(s):  
王乾廷 Wang Qianting ◽  
曾宪斌 Zeng Xianbin ◽  
陈昌荣 Chen Changrong ◽  
练国富 Lian Guofu ◽  
黄旭 Huang Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Laser Cladding ◽  
Cladding Layer ◽  
Microstructure And Mechanical Properties ◽  
Composite Laser

scholarly journals Effect of Vanadium Content on the Microstructure and Mechanical Properties of IN718 Alloy by Laser Cladding

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2362
Author(s):  
Hao Lv ◽  
Zhijie Li ◽  
Xudong Li ◽  
Kun Yang ◽  
Fei Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Laser Cladding ◽  
Primary Dendrite ◽  
Dendritic Structure ◽  
Vanadium Content ◽  
Apparent Effect ◽  
Cladding Layer ◽  
Microstructure And Mechanical Properties ◽  
Distribution Of Elements ◽  
Primary Dendrite Arm Spacing

Microalloying vanadium can change the segregation state of Nb element in IN718 alloy, reduce the formation of harmful Laves phase and refine the dendritic structure of IN718 alloy during the laser process. Therefore, IN718 alloys with V content from 0.081 to 1.88 wt.% were prepared and evaluated. Metallographic microscopy and scanning electron microscopy were used to observe the corresponding morphology, structure, and distribution of elements. First of all, it was found that the addition of V refines the grain size of IN718 alloy and reduces the primary dendrite arm spacing. Secondly, adding V to IN718 alloy can reduce the porosity of the cladding layer. The elements are uniformly distributed in the cladding layer, and the addition of vanadium reduces the segregation degree of the Nb element, which is conducive to homogenization. In addition, microhardness and residual stress were also investigated. Finally, the addition of vanadium was shown to have no apparent effect on the tensile strength and yield strength but can significantly improve the elongation of IN718 alloy. In conclusion, the microstructure and mechanical properties of IN718 alloy with 0.081 wt.% vanadium content provide a new solution to improve the application level of IN718 alloy in laser cladding.

Effects of Y2O3 on Microstructure and Mechanical Properties of Laser Clad Coatings Reinforced by In Situ Synthesized TiB and TiC

2011 ◽  
Vol 675-677 ◽  
pp. 589-592 ◽  
Author(s):  
Jun Li ◽  
Zhi Shui Yu ◽  
Hui Ping Wang
Keyword(s):  
Mechanical Properties ◽  
Laser Cladding ◽  
Volume Fraction ◽  
Fine Needle ◽  
Microstructure And Mechanical Properties ◽  
Y2o3 Addition ◽  
Cracking Sensitivity

Titanium-based coatings reinforced by in situ synthesized TiB and TiC were deposited on Ti6Al4V by laser cladding. The effects of Y2O3 on microstructure and mechanical properties of the coatings were investigated. The coating without Y2O3 is mainly composed of a-Ti cellular dendrites and an eutecticum in which a large number of coarse and fine needle-shaped TiB and a few equiaxial TiC particles are homogeneously embedded. A small amount of Y2O3 addition can refine the microstructure by transforming a-Ti grains from cellular dendrites to columnar or equiaxial crystals, and can increase the volume fraction of the reinforcements. The addition of Y2O3 can also increase microhardness and reduce the cracking sensitivity of the coating.

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