The effect of Cr addition on mechanical and chemical properties of Ni3Si alloys
The effect of Cr addition on mechanical and chemical properties of Ni3Si alloys
复制标题
Cr添加对Ni3Si合金力学和化学性能的影响
DOI：
10.1016/s0921-5093(01)01619-7
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发表时间：
2002
期刊：
影响因子：
6.4
通讯作者：
Y. Kaneno
中科院分区：
文献类型：
--
作者：
T. Takasugi;H. Kawai;Y. Kaneno
采用光学显微镜、x射线衍射仪（XRD）和扫描电镜（SEM）结合电子探针分析对Ni-Si-Cr三元合金的合金化行为和显微组织进行了表征。Ni - si - cr三元合金的显微组织由大量分散的ni5si2相和Ni固溶体中细小析出的Ni3Si相组成。然后，对其高温力学性能、三点弯曲试验、氧化和腐蚀性能进行了研究。Ni-Si-Cr三元合金在较宽的温度范围内表现出明显的强化，在高温下也表现出较大的压缩塑性变形。室温下的强度和断裂韧性与ni5si2相的体积分数有关。与Ni3Si和Ni3（Si,Ti）合金相比，Ni-Si-Cr三元合金在1173 K的空气中表现出明显的抗氧化性。此外，Ni-Si-Cr三元合金的耐蚀性与Ni3Si和Ni3（Si,Ti）合金相当。
The alloying behavior and microstructure of the Ni–Si–Cr ternary alloys were firstly characterized by optical microscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM) with electron probe analysis. The microstructures of the Ni–Si–Cr ternary alloys consisted of largely dispersed Ni5Si2phase and finely precipitated Ni3Si phase in Ni solid solution. Then, the high-temperature mechanical properties, three-point bend test, oxidation and corrosion properties were investigated. The Ni–Si–Cr ternary alloys showed significant strengthening over a wide range of temperatures, and also large compressive plastic deformation at high temperatures. The strength and fracture toughness at ambient temperatures were correlated with the volume fraction of the Ni5Si2phase. The Ni–Si–Cr ternary alloys showed substantially improved oxidation resistance in air at 1173 K, comparing with the Ni3Si and Ni3(Si,Ti) alloys. Also, the Ni–Si–Cr ternary alloys showed corrosion resistance comparable to the Ni3Si and Ni3(Si,Ti) alloys.