气体弧接Fe-17Mn-5Si-10Cr-4Ni-(V,C) 形状记忆合金的微观结构和形状记忆性能
Dohyung Kim1,2, Taeyoon Kim2,3, Changwook Ji4
1School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
Materials (Basel, Switzerland)
|September 28, 2024
概括
接基于Fe的形状记忆合金 (Fe-SMA) 板影响性能,但老化处理显著增强形状记忆效应 (SME) 和恢复压力. 本研究详细介绍了Fe-SMA性能最佳的接参数和接后处理.
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:
- 基于Fe的形状记忆合金 (Fe-SMAs) 是先进的材料,具有潜在的应用,需要独特的机械和回收性能.
- 接是一种常见的制造方法,但它对Fe-SMA特性的影响需要仔细研究.
- 了解微结构变化及其对功能性质的影响对于优化Fe-SMA性能至关重要.
研究的目的:
- 研究气体弧接对Fe-SMA板的微观结构,机械性能和形状记忆性能的影响.
- 为了确定接2毫米厚的Fe-SMA板的最佳热量输入.
- 评估接后老化处理对接Fe-SMA的性能的影响.
主要方法:
- 气弧接Fe-17Mn-5Si-10Cr-4Ni-(V,C) 质量%的Fe-SMA板. 这是一个非常简单的过程.
- 聚变区 (FZ),受热影响区 (HAZ) 和基材 (BM) 的微结构分析.
- 机械测试包括最终抗拉强度,伪弹性 (PE) 恢复应变,形状记忆效应 (SME) 和恢复应力 (RS).
- 数字图像相关性 (DIC) 分析以评估中小企业的分布.
主要成果:
- 对于2毫米的Fe-SMA板块完全穿透的最佳热量输入被确定为0.12kJ.
- 接导致FZ和HAZ的粒度更大,导致最终拉伸强度降低.
- 接材料表现出较低的PE回收应变和回收应力,但与基材相比,SME增加,归因于粒径效应.
- 老化处理通过碳化物沉显著改善了PE回收,SME和RS.
- 根据DIC的分析,HAZ的中小企业数量最低,FZ的中小企业数量有所改善.
结论:
- 接Fe-SMAs改变了微观结构和机械性能,需要优化参数和接后处理.
- 老化处理有效地恢复和增强接Fe-SMA的形状记忆特性.
- 该研究提供了关于控制接后特定应用的Fe-SMA性能的见解.
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