选区激光熔化6511SS/GH3536多材料界面特性和力学性能研究

目的 考虑不同材料对应的最优工艺参数的差异，研究材料的沉积顺序对多材料界面特性的影响，获得界面无明显缺陷、力学性能良好的多材料部件。方法 采用SLM制备6511不锈钢/GH3536高温合金/6511不锈钢多材料试样，研究材料的沉积顺序对界面特性的影响。采用扫描电子显微镜（SEM）、能量色散光谱（EDS）、X射线衍射（XRD）观察界面微观结构和元素分布情况。通过显微硬度和拉伸实验表征界面的力学性能。结果采用SLM制备的多材料试样的界面无明显缺陷，表明6511不锈钢（6511SS）和GH3536高温合金具有良好的冶金结合特性。由于6511SS与GH3536的最优工艺参数存在差异，GH3536/6511SS的界面扩散区（480μm）宽于6511SS/GH3536的界面扩散区（330μm）。6511SS/GH3536扩散区的硬度介于6511SS与GH3536之间，而GH35636/6511SS扩散区的硬度小于6511SS和GH3536的硬度。拉伸实验结果表明，多材料试样在GH3536高温合金处断裂，其极限拉伸强度与GH3536高温合金相当，多材料试样的断裂伸长率低于GH3536高温合金试样的断...

Interfacial Characterization and Mechanical Properties of 6511SS/GH3536 Multi-material Based on Selective Laser Melting

Multi-material parts are promising for aerospace, biomedical and automotive applications due to their multi-functionality and environmental adaptability. Selective laser melting (SLM) technology is an effective way to fabricate multi-material parts. Since the material is deposited layer-by-layer in SLM, the interface characterization of the multi-materials directly determines the performance of the part. Therefore, the work aims to study the interfacial characterization and mechanical properties of multi-materials prepared by SLM.