Amorphous interfacial microstructure and high bonding strength in Al-Fe bimetallic components enabled by a large-area solid-state additive manufacturing technique
Amorphous interfacial microstructure and high bonding strength in Al-Fe bimetallic components enabled by a large-area solid-state additive manufacturing technique
复制标题
大面积固态增材制造技术实现 Al-Fe 双金属部件的非晶界面微观结构和高结合强度
DOI：
10.1016/j.jmatprotec.2022.117721
复制
发表时间：
2022
影响因子：
6.3
通讯作者：
Allison, J.E.
中科院分区：
文献类型：
--
作者：
Liu, F.C.;Dong, P.;Khan, A.S.;Sun, K.;Lu, W.;Taub, A.;Allison, J.E.
人们对制造大型铝钢 (Al-Fe) 双金属部件的能力的需求不断增长，以实现先进多材料结构的巨大优势，从而实现有效的轻量化和日益智能的功能。在接合界面处形成脆性金属间化合物（IMC）一直是现有制造工艺（包括增材制造技术）安全关键型应用的主要障碍。这项研究表明，新型改进的搅拌摩擦增材制造（M-FSAM）与不锈钢的预处理表面抛光相结合，能够沿着 6061 Al 和 304 不锈钢之间的粘合界面形成相对均匀分布的纳米级非晶层。结果，实现了 280 MPa 的高界面结合强度。与现有的搅拌摩擦焊/增材制造工艺相比，M-FSAM 能够显着提高刀具移动速度，并显着降低 Al-Fe 双金属部件制造的刀具成本。纳米级非晶层由厚度为 10-20 nm 的连续富 O 和 Mg 层和厚度为 50-100 nm 的不连续 Al-Fe-Si 层组成。富含 O 和 Mg 的层由具有纳米晶沉淀物的非晶基质组成，而 Al-Fe-Si 层由具有一定结晶度的 q 玻璃组成。本研究详细分析了独特的Al-Fe界面微观结构的形成机制。
There is a growing demand for the ability to manufacture large-scale aluminum-steel (Al-Fe) bimetallic components for realizing the enormous advantages of advanced multi-material structures which offers effective lightweighting and increasingly smart functionalities. The formation of brittle intermetallic compounds (IMCs) at the bonding interface has been the major barrier to safety-critical applications with existing manufacturing processes, including additive manufacturing techniques. This study showed that a combination of a novel modified friction stir additive manufacturing (M-FSAM) and pre-processing surface polishing of the stainless steel enables the formation of a relative homogenously distributed nanoscale amorphous layer along the bonding interface between the 6061 Al and the 304 stainless steel. As a result, the high interfacial bonding strength of 280 MPa was achieved. Compared to the existing friction stir welding/AM processes, M-FSAM enables a significant increase in tool traverse speed and a remarkable reduction in tool cost for Al-Fe bimetallic component manufacturing. The nanoscale amorphous layer consisted of a continuous O and Mg rich layer 10–20 nm in thickness and a discontinuous Al-Fe-Si layer 50–100 nm in thickness. The O and Mg rich layer consisted of an amorphous matrix with nanocrystalline precipitates while the Al-Fe-Si layer consisted of a q-glass with some degree of crystallinity. The formation mechanism of the unique Al-Fe interfacial microstructure was analyzed in detail in this study.
通过一级转变从熔体中形成 Al-Fe-Si 玻璃
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
L. Bendersky;F. Mompiou
通讯作者：
F. Mompiou
硅在铝中的扩散
影响因子：
2.1
作者：
A. Paccagnella;G. Ottaviani;P. Fabbri;G. Ferla;G. Queirolo
通讯作者：
G. Queirolo