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制6082-T6合金板的高温拉伸力机械性能和微观结构
Tuo Ye1,2, Erli Xia1,2, Sawei Qiu1,2
1School of Intelligent Manufacturing and Mechanical Engineering, Hunan Institute of Technology, Hengyang 421002, China.
Materials (Basel, Switzerland)
|November 14, 2023
概括
6082-T6合金的高温拉伸试验显示,随着温度的上升,强度和流应力下降. 随着再结晶和更容易的滑动系统在升高的温度下激活,异位性减少.
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:
- 卷6082-T6合金在结构应用中广泛使用.
- 了解其高温机械行为对于性能和安全至关重要.
研究的目的:
- 为了研究高温对6082-T6合金的拉伸性能,流应力和异性质的影响.
- 为了将微观结构的进化与观察到的机械变化相关联.
主要方法:
- 在各种高温下进行拉伸试验.
- 使用光学显微镜 (OM),扫描电子显微镜 (SEM),传输电子显微镜 (TEM) 和X射线衍射 (XRD) 的微结构分析.
主要成果:
- 拉力强度和抗变形能力随着温度的增加而下降.
- 微观结构显示,在更高的温度下,脱位密度降低,沉物粗化.
- 塑性得到改善,由增加和加深的小穴表明.
- 在200°C时,由于粒度的延长和α相方向,观察到异质性,随着温度的增加而减弱.
- 由于再结晶和激活的滑动系统,在400°C时没有显著的异构性.
结论:
- 高温降低了6082-T6合金的强度和抗变形能力.
- 微观结构变化,包括沉积物粗化和减少脱位密度,决定了机械反应.
- 温度依赖的异构性与微观结构特征和再结晶动力学有关.
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