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基于B2-硬化NbTiAlZr的耐火高合金的微结构,机械性能和变形机制

Guangquan Tang¹, Xu Shao¹, Jingyu Pang¹

¹Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.

Materials (Basel, Switzerland)

|December 23, 2023

概括

这项研究引入了一种新的耐火高合金 (RHEA),在高温下具有出色的强度和良好的室温柔性. 这种合金是合金.

科学领域:

材料科学材料科学材料科学
金工业是金工业的一个方面.
机械工程机械工程

背景情况:

耐火高合金 (RHEAs) 对于高温应用至关重要.
开发具有强度,延展性和低密度平衡的RHEAs是一项挑战.

研究的目的:

开发和描述一种新的NbTiAlZrHfTaMoW耐火高合金 (RHEA).
评估RHEA在不同温度下的机械性能和变形机制.

主要方法:

合成具有B2矩阵结构的NbTiAlZrHfTaMoW RHEA.
机械试验包括在室温 (298 K) 和高温 (1023 K, 1123 K, 1223 K) 的压缩试验.
微结构分析以了解变形特征.

主要成果:

开发出来的RHEA具有低密度 (7.417.51 g/cm3).
在1023 K (~131 MPa·cm3/g) 和1123 K (~104.2 MPa·cm3/g) 的特殊压力特异性收益强度.
在室温下保持适当的塑料变形性 (ε > 0.35).

结论:

NbTiAlZrHfTaMoW RHEA在高温下表现出优越的特异性强度,超过了许多现有的RHEAs.
添加Zr被确定为固体溶液强化的关键因素,增强特定产量强度.
脱位滑带和动态再结晶有助于合金显著的塑性变形能力和产后软化.

关键词:

B2 阶段 B2 阶段变形微观结构的微观结构耐火高合金是耐火的高合金特定收益率强度的特定收益率强度应变软化应变软化

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