Scholarlink

<p>This study focuses on high-temperature creep behavior of newly designed Mo-containing Ni-based compositionally complex alloys (Mo-CCA). The as-cast microstructure exhibits a dendritic structure with a lamellar morphology rich in Mo-Si in the interdendritic region which upon heating at 1200°C transforms to blocky secondary phases. The alloy showed excellent creep-resistant properties at 700°C with an applied stress of 300&#xa0;MPa and remained within the secondary creep region (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\( \dot{\varepsilon } = 9 \times 10^{{ - 8}} /{\text{s}} \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mover accent="true"> <mi>ε</mi> <mo>˙</mo> </mover> <mo>=</mo> <mn>9</mn> <mo>×</mo> <msup> <mn>10</mn> <mrow> <mo>-</mo> <mn>8</mn> </mrow> </msup> <mo stretchy="false">/</mo> <mtext>s</mtext> </mrow> </math></EquationSource> </InlineEquation>) up to 100&#xa0;h in the heat-treated state. The deformed microstructure revealed the formation of the L1<sub>2</sub> ordered phase along with the Mo-Si-rich phase during deformations. The stress exponent of ~ 4.8 and activation energy of ~ 280&#xa0;KJ/mol indicate the occurrence of a dislocation-based deformation mechanism.</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

Enhanced Creep Resistance in Ni-Based Compositionally Complex Alloy with Multiphase Microstructures

  • 期刊论文

  • 发表日期：

    2025年12月19日

查看全文
  • Ananya Chattree,
  • Debasmita Pani,
  • Saurabh S. Nene,
  • Jaiveer Singh

摘要

This study focuses on high-temperature creep behavior of newly designed Mo-containing Ni-based compositionally complex alloys (Mo-CCA). The as-cast microstructure exhibits a dendritic structure with a lamellar morphology rich in Mo-Si in the interdendritic region which upon heating at 1200°C transforms to blocky secondary phases. The alloy showed excellent creep-resistant properties at 700°C with an applied stress of 300 MPa and remained within the secondary creep region ( \( \dot{\varepsilon } = 9 \times 10^{{ - 8}} /{\text{s}} \) ε ˙ = 9 × 10 - 8 / s ) up to 100 h in the heat-treated state. The deformed microstructure revealed the formation of the L12 ordered phase along with the Mo-Si-rich phase during deformations. The stress exponent of ~ 4.8 and activation energy of ~ 280 KJ/mol indicate the occurrence of a dislocation-based deformation mechanism.