Muhammad Samiuddin, Jinglong Li, Mudassir Farooq, J. Xiong
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引用次数: 0
摘要
该研究主要侧重于检测钴铬镍 MEA 和 SUS 304 不锈钢通过扩散焊接形成的焊接界面的纳米力学性能和腐蚀行为。在生产扩散焊接接头时采用了三种不同的焊接温度(即 950 ℃、1000 ℃ 和 1050 ℃)。通过在不同载荷(即 20 mN 至 100 mN)下进行纳米压痕测试,确定了接合温度对焊接界面纳米力学性能的影响。此外,还使用 0.5 M HCl 溶液检测了焊接界面的电化学特性。结果表明,随着焊接温度的升高,焊接界面的碳化物形成明显减少。这导致纳米硬度和弹性模量的降低,从而使焊接界面的弹性恢复最大。压痕大小效应在 40 毫牛顿载荷以下也很明显,之后纳米硬度变得稳定,而弹性模量则不受压痕载荷变化的影响。此外,根据电化学特性(即 Icorr、Ep 和 Rp),在 1000 °C 焊接温度下焊接的样品在 0.5M HCl 环境下具有优异的耐腐蚀性。
Evaluation of nano mechanical properties and corrosion behavior of diffusion welded CoCrNi medium-entropy alloy (MEA) and SUS 304 stainless steel joints
The study mainly focused on examining nanomechanical properties and corrosion behavior of the weld interface formed by diffusion welding of CoCrNi MEA and SUS 304 stainless steel. Three different bonding temperatures (i.e. 950 °C, 1000 °C, and 1050 °C) were utilized in producing diffusion welded joints. The influence of bonding temperatures on nanomechanical properties of the weld interface was characterized through Nanoindentation tests under various loads (i.e. 20 mN to 100 mN). Additionally, electrochemical properties of the weld interface were also examined using a 0.5 M HCl solution. Results clinched that with the increase of bonding temperature significant suppression in carbide formation occurred along with the weld interface. This instigated a reduction in nano hardness and elastic moduli which resulted in maximum elastic recovery along with the weld interface. The indentation size effect was also evident below 40 mN load after which nano hardness became stable while elastic moduli remained impervious to the change of indentation load. Furthermore, based upon electrochemical properties (i.e. Icorr, Ep, and Rp) samples welded at 1000 °C bonding temperature offered excellent corrosion resistance under 0.5M HCl environment.
期刊介绍:
Revista de Metalurgia is a bimonhly publication. Since 1998 Revista de Metalurgia and Revista Soldadura have been combined in a single publicación that conserves the name Revista de Metalurgia but also includes welding and cutting topics. Revista de Metalurgia is cited since 1997 in the ISI"s Journal of Citation Reports (JCR) Science Edition, and in SCOPUS.