Scholarlink

<p>NiCoFeCr<sub><i>x</i></sub>Al high-entropy alloy has important potential in industrial applications due to its excellent mechanical properties and corrosion resistance. This study systematically discusses the preparation, mechanical properties, and corrosion behavior of NiCoFeCr<sub><i>x</i></sub>Al high-entropy alloy. NiCoFeCr<sub><i>x</i></sub>Al alloys with different Cr contents are prepared by high-energy ball milling. The microstructure results show that when <i>x</i> = 0.6, the NiCoFeCr<sub><i>x</i></sub>Al alloy has a dual-phase structure of FCC + BCC, and there is a small amount of B2 phase. When <i>x</i> = 1, 1.4, there is a large amount of B2 phase in NiCoeCr<sub>1</sub>Al alloy. The NiCoFeCr<sub><i>x</i></sub>Al alloy undergoes passivation in a NaCl solution with a mass fraction of 3.5%, and the corrosion resistance of the alloy increases as the Cr content is increasing. The corrosion potential of the high Cr NiCoFeCr<sub>1.4</sub>Al alloy is −0.026&#xa0;V, and the corrosion current is 3.01 × 10<sup>−5</sup>&#xa0;A/cm<sup>2</sup> with the breakdown potential 0.235&#xa0;V. In addition, mechanical research shows that the compressive strength, compressibility, and microhardness of NiCoFeCr<sub><i>x</i></sub>Al alloy in the low Cr state (<i>x</i> = 0.6) are 1136&#xa0;MPa, 15.6%, and 1696 ± 97&#xa0;HV, respectively. When <i>x</i> = 1.4, the strength of the alloy increases to 1772&#xa0;MPa, the compression rate is 11.3%, and the hardness increases to 2676 ± 98&#xa0;HV. These studies all show that increasing the Cr content is an important way to prepare high-strength, corrosion-resistant NiCoFeCrAl alloys.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on the Preparation of NiCoFeCrxAl High-Entropy Alloy and Its Mechanical Properties and Corrosion Behavior

  • 期刊论文

  • 发表日期：

    2025年5月30日

查看全文
  • Wang Xin,
  • Liu Cong,
  • Yu Zhaoxu,
  • Kong Tiantian,
  • Li Qingning,
  • Bian Zhiruo

摘要

NiCoFeCrxAl high-entropy alloy has important potential in industrial applications due to its excellent mechanical properties and corrosion resistance. This study systematically discusses the preparation, mechanical properties, and corrosion behavior of NiCoFeCrxAl high-entropy alloy. NiCoFeCrxAl alloys with different Cr contents are prepared by high-energy ball milling. The microstructure results show that when x = 0.6, the NiCoFeCrxAl alloy has a dual-phase structure of FCC + BCC, and there is a small amount of B2 phase. When x = 1, 1.4, there is a large amount of B2 phase in NiCoeCr1Al alloy. The NiCoFeCrxAl alloy undergoes passivation in a NaCl solution with a mass fraction of 3.5%, and the corrosion resistance of the alloy increases as the Cr content is increasing. The corrosion potential of the high Cr NiCoFeCr1.4Al alloy is −0.026 V, and the corrosion current is 3.01 × 10−5 A/cm2 with the breakdown potential 0.235 V. In addition, mechanical research shows that the compressive strength, compressibility, and microhardness of NiCoFeCrxAl alloy in the low Cr state (x = 0.6) are 1136 MPa, 15.6%, and 1696 ± 97 HV, respectively. When x = 1.4, the strength of the alloy increases to 1772 MPa, the compression rate is 11.3%, and the hardness increases to 2676 ± 98 HV. These studies all show that increasing the Cr content is an important way to prepare high-strength, corrosion-resistant NiCoFeCrAl alloys.