选择性激光熔化热等静压处理TiC/GTD222复合材料的热腐蚀行为

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Anti-corrosion Methods and Materials Pub Date : 2023-12-05 DOI:10.1108/acmm-08-2023-2870

Yuting Lv, Yaojie Liu, Rui Wang, Hongyao Yu, Zhongnan Bi, Guohao Liu, Guangbao Sun

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引用次数: 0

摘要

目的通过在GTD222合金中加入适量的C、Al和Ti元素，设计一种新型的具有优异耐热腐蚀性能的TiC/GTD222镍基高温合金。采用选择性激光熔化(SLM)技术制备复合材料，然后进行热等静压(HIP)处理。随后，复合材料在900℃的75% Na2SO4 + 25% NaCl混合盐环境中进行热腐蚀试验。发现HIP-SLMed TiC/GTD222复合材料具有较低的减重率。首先，合金元素的加入有利于形成富含Al, Ti和Cr的多层氧化保护膜，这些氧化膜对增强材料的耐热腐蚀能力起着至关重要的作用。其次，HIP处理导致复合材料晶粒尺寸减小，晶界数量增加，进一步促进了保护膜的形成。通过SLM和HIP加工制备的TiC/GTD222镍基复合材料的热腐蚀行为尚未得到研究。本研究为设计耐高温腐蚀性能优异的镍基高温合金提供了新的途径。

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Hot corrosion behavior of hot isostatic pressing treated TiC/GTD222 composite fabricated by selective laser melting

Purpose

This paper aims to design a novel TiC/GTD222 nickel-based high-temperature alloy with excellent hot corrosion resistance by incorporating appropriate amounts of C, Al and Ti elements into GTD222 alloy.

Design/methodology/approach

The composite material was prepared using the selective laser melting (SLM) technology, followed by a hot isostatic pressing (HIP) treatment. Subsequently, the composite underwent a hot corrosion test in a 75% Na₂SO₄ + 25% NaCl mixed salt environment at 900 °C.

Findings

The HIP-SLMed TiC/GTD222 composite exhibits a relatively low weight loss rate. First, the addition of alloying elements facilitates the formation of multiple protective oxide films rich in Al, Ti and Cr. These oxide films play a crucial role in enhancing the material’s resistance to hot corrosion. Second, the HIP treatment results in a reduction of grain size in the composite and an increased number of grain boundaries, which further promote the formation of protective films.

Originality/value

The hot corrosion behavior of the TiC/GTD222 nickel-based composite material prepared through SLM and HIP processing has not been previously studied. This research provides a new approach for designing nickel-based superalloys with excellent hot corrosion resistance.

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.