Effect of amorphous layer thickness on the tensile behavior of bulk-sized amorphous Ni-P/crystalline Ni laminates

Effect of amorphous layer thickness on the tensile behavior of bulk-sized amorphous Ni-P/crystalline Ni laminates
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非晶层厚度对大块非晶 Ni-P/晶态 Ni 层压板拉伸行为的影响

DOI:
10.1016/j.matlet.2018.01.164
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发表时间:
2018-05
期刊:
影响因子:
3
通讯作者:
Yi Li
Yi Li
中科院分区:
材料科学3区
文献类型:
--
作者:
Xiaoyi Cuan;Jie Pan;Ruqing Cao;Yan Lin;Jiahao Yao;Yinxiao Wang;Yi Li

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采用电沉积方法制备了厚度可控的非晶Ni-P层和结晶Ni层的大尺寸叠层。Ni-P镀层的厚度对力学性能有很强的依赖性。具有薄Ni-P层的层压板显示出理想的强度和延展性的组合,其甚至优于晶态Ni。在这种情况下,Ni-P层中的剪切带被抑制与Ni层的有效约束,导致层压板的韧性断裂。随着Ni-P层厚度的增加,层合板的主要断裂模式由各层的共同变形转变为非晶态Ni-P层的剪切带,导致层合板塑性降低,最终发生脆性断裂。
Bulk-sized laminates with controllable thicknesses for amorphous Ni-P and crystalline Ni layers were prepared by electrodeposition. A strong dependence of mechanical properties on the thickness of Ni-P layer was revealed. The laminates with thin Ni-P layers display a desirable combination of strength and ductility, which is even better than that of crystalline Ni. In this case, shear banding in Ni-P layers is suppressed with an effective constraint of Ni layers, resulting in ductile fracture of the laminates. With increase in Ni-P layer thickness, the dominant fracture mode of the laminate transits from co-deformation of all layers to shear banding in the amorphous Ni-P layers, resulting in the reduced ductility and brittle fracture.
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