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通过不对称制加工的低碳钢的机械异构行为
Alireza Shaabani1, Roohollah Jamaati1, Seyed Jamal Hosseinipour1
1Department of Materials Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol, 47148-71167, Iran.
Heliyon
|July 29, 2024
概括
低碳钢的不对称冷提高了硬度和强度,机械异构性在50%的变形时达到顶峰. 进一步滚动到75%降低了由于改变了微观结构和质地而导致的异构性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 金工业是金工业的一个方面.
背景情况:
- 低碳钢的机械性能对于各种应用至关重要.
- 非对称冷是一种加工技术,可以显著改变材料性能.
- 了解微观结构,纹理和机械行为之间的相互作用对于材料设计至关重要.
研究的目的:
- 研究通过不对称冷加工加工的低碳钢的机械异构性行为.
- 分析不同冷变形度对微观结构,纹理和机械性能的影响.
- 为了将动态再结晶机制的变化和纹理演变与机械异构性相关联.
主要方法:
- 低碳 (Fe-0.07C) 钢的不对称冷不同程度的变形 (高达75%).
- 微结构分析以确定动态再结晶 (DRX) 机制 (连续,不连续,几何).
- 在各种变形级别和方向下进行纹理分析 (γ-纤维强度) 和机械测试 (硬度,屈服强度,抗拉强度,异构性).
主要成果:
- 不对称的冷显著增加了硬度,屈服强度和抗拉强度,在75%的变形时达到峰值.
- 机械异质性最初在变形时增加到50%,但由于γ纤维质地减弱,在75%下降.
- 在75%的冷过程中观察到三种DRX机制,在横向方向 (90°) 上强度最高.
结论:
- 不对称的冷有效地提高了低碳钢的强度.
- 寒冷变形的程度极大地影响机械异构性,主要是通过质地演变.
- 微观结构变化,包括DRX机制和变形带,在观察到的机械反应中起着关键作用.
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