电子束自由成形锆合金的显微组织、力学性能和耐蚀性

IF 4.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-14 DOI:10.1016/j.ijrmhm.2025.107380

Xiaochen Liu , Ting Wang , Debin Song , Lianfeng Wei , Yunxi Zheng

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引用次数: 0

摘要

采用电子束自由成形（EBF3）技术制备了锆（Zr）合金。系统地研究了沉积态（AD）试样的显微组织特征、力学性能和耐腐蚀性能。结果表明：AD样品主要由α相组成，具有粗糙的条状和择优取向的特点；AD试样的极限强度（UTS）、屈服强度（YS）和延伸率分别为442 MPa、405 MPa和16.9%。AD样品的平均显微硬度为163 HV0.2。与轧制（RO）基板相比，由于α条的形成，AD样品的力学性能有所下降。而AD样品具有较好的耐电化学腐蚀性能。AD样品的击穿电位为1.16 V，远高于RO样品的0.65 V。此外，在360°C/18.6 MPa的去离子水中，AD样品的氧化速率与RO样品相当。研究表明，EBF3工艺是制备Zr合金零件的一种可行方法。

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Microstructure, mechanical properties and corrosion resistance of a zirconium alloy fabricated by electron beam freeform fabrication

In this study, a zirconium (Zr) alloys was prepared by electron beam freeform fabrication (EBF³) technology. The microstructural characteristics, mechanical properties, and corrosion resistance properties of the as-deposited (AD) sample were systematically investigated. The results showed the AD sample was mainly composed of α phases, exhibiting the characteristics of coarse laths and preferred orientation. The ultimate strength (UTS), yield strength (YS), and the elongation of the AD sample were 442 MPa, 405 MPa, and 16.9 %, respectively. The average microhardness of the AD sample was 163 HV_0.2. Compared to the rolled (RO) substrate, the AD sample exhibited a decrease in the mechanical properties due to the formation of α laths. However, the AD sample exhibited better electrochemical corrosion resistance. The breakdown potential of the AD sample was 1.16 V, which was much higher than that of the RO sample (0.65 V). In addition, the oxidation rate of the AD sample in deionized water at 360 °C/18.6 MPa was comparable to that of the RO sample. This study suggests that the EBF³ technology is a viable method for fabricating Zr alloy parts.

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.