ADVANCED MATERIALS & PROCESSES | APRIL 2025 40 iTSSe TSS iTSSe TSS 9 FAST AND NONDESTRUCTIVE MECHANICAL CHARACTERIZATION OF THERMALLY SPRAYED AND LASER CLADDED COATINGS: AUTOMATED SURFACE ACOUSTIC WAVE SPECTROSCOPY AS A NEW TOOL FOR QUALITY CONTROL AND RESEARCH Martin Zawischa, Stefan Makowski, and Filofteia-Laura Toma Laser-induced surface acoustic wave spectroscopy allows quick and nondestructive evaluation of the elastic properties, such as the Young’s modulus, of coatings, surfaces, and surface-near bulk materials. Furthermore, the mechanical weakening due to cracks and pores can be evaluated, as they influence the propagation of surface waves as well. This makes the method a fast, accurate, and versatile tool for surface characterization, and it is increasingly used in research and development and quality control. (Fig. 1) The Journal of Thermal Spray Technology (JTST), the official journal of the ASM Thermal Spray Society, publishes contributions on all aspects— fundamental and practical— of thermal spray science, including processes, feedstock manufacture, testing, and characterization. As the Fig. 1 — Distribution of the effective Young’s modulus for two comparable Al2O3 coatings, which differed in their production only in the movement direction of the spray gun (“1st coating direction”). Fig. 2 — Elemental distribution of in-situ precipitated phases in coating 1# with 1 wt% Si addition. INVESTIGATION ON THE MICROSTRUCTURE EVOLUTION AND PROPERTIES OF A NOVEL IN-SITU FIBER PHASE-REINFORCED NICKEL COMPOSITE COATING DEPOSITED BY WIDEBAND LASER Xing Wang, Nannan Ren, Kun Zhao, Wei Meng, Hu Xie, Xiaohui Yin, and Qunshuang Ma In this paper, novel hard nickel composite coatings were fabricated by a wide-band laser cladding technique. The effects of Si alloying on the composite coatings were investigated by microstructure characterization, phase identification, microhardness, and wear resistance. Results showed that the in-situ precipitated phases in the laser molten pool were composed of the γ-Ni solid solution and hard phases such as Cr23C6, CrSi, and Cr5B3. (Fig. 2) primary vehicle for thermal spray information transfer, its mission is to synergize the rapidly advancing thermal spray industry and related industries by presenting research and development efforts leading to advancements in implementable engineering applications of the technology. The highlighted papers below, hand-picked by Editor-in-Chief André McDonald, spotlight laser cladding and laser-based deposition processes that are shaping the future of thermal spray technology. In addition to the print publication, JTST is available online through link.springer. com. For more information, visit asminternational.org/tss. JTST HIGHLIGHTS
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