scholarly journals In Situ Formation of Ti47Cu38Zr7.5Fe2.5Sn2Si1Nb2 Amorphous Coating by Laser Surface Remelting

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3660 ◽  
Author(s):  
Peizhen Li ◽  
Lingtao Meng ◽  
Shenghai Wang ◽  
Kunlun Wang ◽  
Qingxuan Sui ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Elastic Modulus ◽  
Laser Surface ◽  
Corrosion Mechanism ◽  
Amorphous Coating ◽  
Laser Surface Remelting ◽  
The Matrix ◽  
In Situ Formation ◽  
Amorphous Coatings

In previous studies, Ti-based bulk metallic glasses (BMGs) free from Ni and Be were developed as promising biomaterials. Corresponding amorphous coatings might have low elastic modulus, remarkable wear resistance, good corrosion resistance, and biocompatibility. However, the amorphous coatings obtained by the common methods (high velocity oxygen fuel, laser cladding, etc.) have cracks, micro-pores, and unfused particles. In this work, a Ti-based Ti47Cu38Zr7.5Fe2.5Sn2Si1Nb2 amorphous coating with a maximum thickness of about 100 μm was obtained by laser surface remelting (LSR). The in-situ formation makes the coating dense and strongly bonded. It exhibited better corrosion resistance than the matrix and its corrosion mechanism was discussed. The effects of LSR on the microstructural evolution of Ti-based prefabricated alloy sheets were investigated. The nano-hardness in the heat affected zone (HAZ) was markedly increased by 51%, meanwhile the elastic modulus of the amorphous coating was decreased by 18%. This demonstrated that LSR could be an effective method to manufacture the high-quality amorphous coating. The in-situ amorphous coating free from Ni and Be had a low modulus, which might be a potential corrosion-resistant biomaterial.

Effects of Laser Processing Parameters on Grain Boundary Character Distribution and Corrosion Resistance of Austenite Stainless Steel

2007 ◽  
Vol 561-565 ◽  
pp. 2473-2476 ◽  
Author(s):  
Sen Yang ◽  
Hiroyuki Kokawa ◽  
Zhan Jie Wang
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Laser Processing ◽  
Processing Parameters ◽  
Laser Surface ◽  
304 Stainless Steel ◽  
Grain Boundary Character Distribution ◽  
Grain Boundary Character ◽  
Laser Surface Remelting ◽  
Character Distribution

In order to modify grain boundary character distribution (GBCD) and to improve intergranualr corrosion (IGC) resistance of 304 stainless steel, laser surface remelting experiments were conducted on 304 stainless steel using a 2kW CW Nd: YAG laser, and the effects of laser processing parameters on GBCD and corrosion resistance were investigated in detail under the optimal annealing condition (1220K 28h). The experimental results showed that combination of laser surface remelting and the following annealing treatment could change the GBCD remarkably and improve the IGC resistance of 304 stainless steel. However, there are no obvious effects of laser processing parameters on the final depth of the processed zone, although the depth of the molten pool increases with the increase of the laser output power or the decrease of the scanning velocity, and the subsequent GBCD and corrosion resistance.

In-situ technique for measuring the absorption during laser surface remelting

1991 ◽  
Vol 22 (1) ◽  
pp. 139-141 ◽  
Author(s):  
A. Frenk ◽  
A. F. A. Hoadley ◽  
J. -D. Wagnière
Keyword(s):  
Laser Surface ◽  
Laser Surface Remelting ◽  
In Situ Technique

Study on Corrosion Resistance and Mechanical Property of Welding HAZ Treated by Laser Surface Remelting

2013 ◽  
Vol 734-737 ◽  
pp. 2346-2350 ◽  
Author(s):  
Yan Li Li ◽  
Jia Rui Qi ◽  
Dan Feng Zhang ◽  
Ji Liu ◽  
Chao Li
Keyword(s):  
Mechanical Property ◽  
Corrosion Resistance ◽  
Corrosion Current ◽  
Processing Parameters ◽  
Electrochemical Analysis ◽  
Constructional Steel ◽  
Orthogonal Test ◽  
Laser Surface ◽  
Laser Remelting ◽  
Laser Surface Remelting

Welding is a main joint way of the alloy constructional steel. However, the welding HAZ is very sensitive to corrosion. In order to increase the corrosion resistance of the welding HAZ without reducing mechanical property of the parts simultaneously, the laser surface remelting was used to treat the welding HAZ in this study. According to the results of the orthogonal test, the optimized processing parameters were obtained. Based on the electrochemical analysis, the corrosion current of 30CrMnSi welding HAZ can be decreased by laser remelting technology. The corrosion resistance of the HAZ can be improved effectively. At the same time, the mechanical property of the treated welding HAZ was better compared with the untreated.

Corrosion Mechanism of Plasma-Sprayed Fe-Based Amorphous Coatings with High Corrosion Resistance

2020 ◽  
Vol 29 (5) ◽  
pp. 1111-1118 ◽  
Author(s):  
Zhenhua Chu ◽  
Wenxing Deng ◽  
Xingwei Zheng ◽  
Yuyun Zhou ◽  
Chunyue Zhang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Mechanism ◽  
High Corrosion Resistance ◽  
High Corrosion ◽  
Plasma Sprayed ◽  
Amorphous Coatings

scholarly journals The Corrosion Resistance and Mechanism of AT13/Fe-Based Amorphous Composite Coatings

Micromachines ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 56
Author(s):  
Zhenhua Chu ◽  
Shikun Teng ◽  
Yuyun Zhou ◽  
Xingwei Zheng ◽  
Jingxiang Xu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Composite Coatings ◽  
High Strength ◽  
Corrosion Current ◽  
High Wear Resistance ◽  
Corrosion Mechanism ◽  
Amorphous Coating ◽  
Immersion Corrosion ◽  
Long Time ◽  
Glassy Coating

Due to high strength, high wear resistance and high corrosion resistance, the amorphous metallic glasses were investigated widely. In the present study, the corrosion resistance of amorphous coating and composite coatings with various proportions of AT13 (Al2O3–13 wt.% TiO2) ceramic as additions in 3.5 wt.% NaCl solution were studied. The corrosion resistance was improved obviously as the addition of AT13, and when the content of AT13 was 15 wt.%, the composite coating had the lowest corrosion current density (1.75 × 10−6 A cm−2) and the highest corrosion potential (−411 mV), which was 5.14 × 10−5 A cm−2 and −580 mV for Fe-based metallic glassy coating, respectively. The corrosion mechanism was proposed according to the long-time immersion corrosion test.

Microstructure and Corrosion Resistance of In Situ Al0.983Cr0.017/Al Composites

2012 ◽  
Vol 535-537 ◽  
pp. 206-209
Author(s):  
Jian Zhang ◽  
Qiu Lin Wang ◽  
Bin Wan ◽  
Long Zhi Zhao
Keyword(s):  
Corrosion Resistance ◽  
Intermetallic Compounds ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Mechanical Stirring ◽  
Al Composite ◽  
The Matrix ◽  
Clean Interface

In situ Al0.983Cr0.017 intermetallic compounds reinforced aluminum matrix composite was fabricated by the mechanical stirring casting method in this paper. In addition, microstructure and corrosion resistance of composite was investigated by XRD and SEM. The results show that the Al0.983Cr0.017 intermetallic compounds reinforcement distribute in the matrix uniformly. The clean interface between reinforcement and matrix has good interfacial bond. The corrosion resistance of Al0.983Cr0.017/Al composite materials presented a U-shaped curve, the best corrosion resistance present in the composite with 12% volume fraction reinforcement. The Al0.983Cr0.017 has a high corrosion resistance, which promoted the nucleation of pitting. Furthermore, the reinforcement interrupt the continuity of the matrix, inhibits the further expansion of pitting, which increases the corrosion resistance of composites.

Effects of laser surface remelting on the molten salt corrosion resistance of yttria-stabilized zirconia coatings

2018 ◽  
Vol 44 (18) ◽  
pp. 22645-22655 ◽  
Author(s):  
Peng Yi ◽  
Javad Mostaghimi ◽  
Larry Pershin ◽  
Pengyun Xu ◽  
Xianghua Zhan ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Molten Salt ◽  
Laser Surface ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Laser Surface Remelting ◽  
Salt Corrosion
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