电子束接低,强化奥氏体不钢的微观结构和机械特征
Ahmad Naseem1, Muhammad Ilyas2, Tauheed Shehbaz3
1Faculty of Mechanical Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, 23640, Topi, Pakistan.
Heliyon
|August 8, 2024
概括
电子束 (EBW) 有效地加入了低增强的奥氏体不钢 (LNiASS). 这种先进的接方法保留了关键的机械性能,并提高了LNiASS接中的冲击能量吸收.
科学领域:
- 材料科学 材料科学 材料科学
- 金工程 金工程 金工程
- 接技术 接技术
背景情况:
- 低增强奥氏体不钢 (LNiASS) 具有优良的性能,但在传统接方面面临挑战.
- 传统的接方法可能会导致热裂变,降低性,并对LNiASS造成有害的微观结构变化.
研究的目的:
- 评估电子束接 (EBW) 在连接LNiASS的有效性.
- 分析EBW加工LNiASS的微结构特性和机械性能.
主要方法:
- 使用电子束 (EBW) 连接LNiASS板.
- 通过光学显微镜和扫描电子显微镜 (SEM) 进行微结构分析.
- 机械性能评估包括拉力测试,微硬度测试,Charpy V-Notch (CVN) 冲击测试和残余应力分析.
主要成果:
- 在EBW中,可以生产具有不同铁形态的接,避免有害的阶段沉.
- 接强度达到了基本合金的约90%,由于气损失和HAZ粒度粗而导致的断裂.
- 微硬度由于微结构演变和细粒度增加了12.9%.
- 在CVN测试中,冲击能量吸收在接中比基材高50%左右.
- 纵向残余应力在中厚度以下是压缩性的.
结论:
- EBW是一种可行的技术,可以加入LNiASS,最大限度地减少对材料性能的负面影响.
- 与基础材料相比,接过程导致了更好的冲击性和硬度.
- EBW显示了提高强化不钢的性能和应用范围的潜力.
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