超强和柔性钢接是通过微型结构的微型结构与膜状保留的奥氏体来实现的
Joonoh Moon1, Gyuyeol Bae2, Bo-Young Jeong3
1Department of Materials Convergence and System Engineering, Changwon National University, Changwon, Gyeongnam, Republic of Korea. mjo99@changwon.ac.kr.
Nature communications
|February 12, 2024
概括
这项研究引入了一种新的接技术,用于使用 (Nb) 和 (Cr) 而不是 (Ni) 的超高强度钢. 这种方法提高了接强度,柔性和性,同时降低了成本和环境影响.
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:
- 接超高强度钢通常会导致由于谷物粗和脆性阶段形成而导致机械性能退化,从而限制产品的寿命.
- 在这些合金中通常使用 (Ni),但其使用带来了成本和环境问题.
研究的目的:
- 研究使用 (Nb) 和 (Cr) 作为Ni的替代品,提高超高强度钢的接质量的有效性.
- 了解Nb和Cr添加后获得的增强性质背后的微结构机制.
主要方法:
- 用Nb和Cr合金设计超高强度钢,取代Ni.
- 接过程的优化.
- 接的微观结构特征.
- 机械性能测试 (拉力,性,疲劳).
主要成果:
- 与单独的Cr相比,Nb和Cr的组合添加导致了更细的接微观结构.
- 由于奥氏体转化温度降低和碳活性降低,观察到保留的奥氏体的比重更高.
- Nb-Cr合金设计产生了超强和柔性接,具有显著增强的拉伸性能,冲击性和疲劳强度.
结论:
- 用Nb和Cr取代Ni,为改善超高强度钢的接质量提供了一个可行的策略.
- 这种方法带来了优越的机械性能,降低了45%的材料成本,并减少了环境足迹.
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