通过引入中间层的动态再结晶,提高了超声波接的奥氏体不钢接头的强度
Yun-Ta Chung1,2, Hue-En Chu1,2, Yu-Hsuan Juan1
1Department of Mechanical Engineering, National Taipei University of Technology, No. 1, Sec. 3, Zhongxiao E. Rd., Taipei, 10608, Taiwan.
Scientific reports
|August 2, 2024
概括
添加铁或中间层显著提高了奥氏体不钢的超声波接强度,通过增强界面变形性. 这种方法提高了关节的完整性,并减少了接时间.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 制造过程 制造过程 制造过程
背景情况:
- 由于界面变形能力有限,奥氏体不钢 (SS) 的超声波接存在挑战.
- 没有中间层,标本在低于最佳的温度下表现出不良的强度增强和内部裂纹.
- 实现坚固的关节需要克服奥氏体SS的固有材料特性.
研究的目的:
- 研究界面可变性对结完整性和强度在奥氏体SS的超声波接中的影响.
- 评估Fe和Ni间层在提高关节强度和减少接持续时间方面的有效性.
- 了解微观结构的演变及其与界面强度的相关性.
主要方法:
- 超声波接的奥氏体不钢标本,有或没有Fe/Ni介层.
- 拉皮剪切测试用于评估界面强度和断裂行为.
- 微结构分析,包括动态再结晶 (DRX) 和颗粒大小的观察.
- 对界面强度,高峰温度和硬度之间的相关性分析.
主要成果:
- 没有中间层的标本由于内部裂纹而表现出有限的强度.
- 铁和中间层显著增加了界面强度 (高达2500N),并将接时间缩短了40%.
- 间层在0.4Tm以下的温度下促进粘合,适应可塑性并防止基板损坏.
- 铁中间层通过DRX显示了谷物精炼,而Ni中间层显示了谷物生长.
结论:
- 引入Fe和Ni间层对于提高结完整性和强度在奥氏体SS的超声波接中至关重要.
- 通过中间层增强的界面可变性,可以形成强大的关节,减少接时间.
- 该研究展示了一种可行的方法,用于生产更坚固,更可靠的不钢接头.
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