Enhancement of high temperature oxidation and hot corrosion resistance behaviors of selective laser melted Ti6Al4V by ultrasonic shot peening

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2024-11-22 DOI:10.1016/j.matchemphys.2024.130170

M. Srikanth , B. Sai Charan , Dasari Muthya Venu , K. Venkatesan , Gosipathala Sreedhar , Kausik Chattopadhyay , Deepak K. Pattanayak

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Abstract

In the present study, Ultrasonic shot peening (USSP) method has been adopted to understand the electrochemical corrosion resistance, high temperature oxidation and hot corrosion resistance of Ti alloy (Ti6Al4V) fabricated by Selective Laser Melting (SLM) process. The results showed the significant enhancement in electrochemical corrosion resistance in 3.5 wt% NaCl, high temperature oxidation resistance and hot corrosion resistance in Na₂SO₄ + 25 % NaCl and Na₂SO₄ + 50 % V₂O₅ at 750 °C after the USSP treatment. Various characterization techniques such as Optical Microscopy, Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS) and Field Emission Scanning Electron Microscopy (FE-SEM) used to characterize the high temperature oxidation as well as the hot corrosion products and the result confirms the formation of various oxide compounds such as TiO₂, Al₂O₃, V₂O₃, V₂O₅, Na₂TiO₃ etc. Grain size have been significantly reduced from 62.4 ± 6.5 to 39.3 ± 3.4 μm and it substantially improved the hardness value from 386 to 457.5 HV after USSP treatment.

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超声喷丸强化选择性激光熔化Ti6Al4V的高温氧化和耐热腐蚀性能

采用超声喷丸（USSP）方法研究了选择性激光熔化（SLM）法制备Ti6Al4V合金的电化学耐蚀性、高温氧化性和热耐蚀性。结果表明：经USSP处理后，材料在3.5 wt% NaCl溶液中的电化学耐蚀性、Na2SO4 + 25% NaCl和Na2SO4 + 50% V2O5溶液中750℃的高温抗氧化性和热腐蚀性能均有显著提高。利用光学显微镜、扫描电镜（SEM）、x射线衍射（XRD）、x射线光电子能谱（XPS）和场发射扫描电镜（FE-SEM）等多种表征技术对高温氧化和热腐蚀产物进行了表征，结果证实形成了多种氧化物化合物，如TiO2、Al2O3、V2O3、V2O5、Na2TiO3等。晶粒尺寸由62.4±6.5 μm显著减小到39.3±3.4 μm，硬度由386 HV显著提高到457.5 HV。

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.