超双不钢 (SDSS) 合金UNS S32750的高温变形行为
Vasile Dănuț Cojocaru1, Nicolae Șerban1, Elisabeta Mirela Cojocaru1
1Faculty of Materials Science and Engineering, National University of Science and Technology Politehnica of Bucharest, 060042 Bucharest, Romania.
Materials (Basel, Switzerland)
|November 9, 2024
概括
超双重不钢 (SDSS) 的高温变形显示,随着更高的温度和冲击能量,变形性增加. 微观结构分析显示,在高温下,长长的颗粒和增加的动态再结晶的铁.
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:
- 超双不钢 (SDSS) 在苛刻的环境中至关重要.
- 了解高温变形对于加工和性能至关重要.
- 之前的研究还没有完全详细说明UNS S32750 SDSS中温度,冲击能量和微观结构的相互作用.
研究的目的:
- 为了研究UNS S32750超双不钢的高温变形行为.
- 分析温度和冲击能量对可变形性和微观结构的影响.
- 描述抗变形,机械工作和微观结构特征的演变.
主要方法:
- 使用具有不同冲击能量 (545.2 J 到 1905.3 J) 的重力落下子进行升降设置方法.
- 在10501200°C的温度范围内进行测试.
- 使用X射线衍射 (XRD) 和扫描电子显微镜-电子反射衍射 (SEM-EBSD) 的微结构分析.
主要成果:
- 变形度随着温度和冲击能量的增加而增加.
- 随着温度的升高,抗变形和机械工作都会降低.
- 微观结构表现出延长的铁 (δ) 和奥氏体 (γ) 粒,变形强度与变形程度相关.
- 更高的变形温度显著增加了动态再结晶 (DRX) 铁素颗粒的重量分数.
结论:
- UNS S32750 SDSS在更高的温度和冲击能量下表现出增强的可变形性.
- 微结构进化受到温度的强烈影响,导致显著的动态再结晶.
- 这些发现为优化SDSS的高温处理提供了关键数据.
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