Taiyong Zou, Zheng Ye, Zhenqian Lang, Tao Wu, Wanli Wang, Qiaomu Liu, Jian Yang, Shuhai Chen, Jihua Huang
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引用次数: 0
Abstract
A special grain boundary morphology, called "mortise-tenon boundary" was conceived and successfully implemented. By the dissolution and renucleation process in an equal/near-substrate-composition interlayer, the mortise-tenon boundaries were constructed in a polycrystalline joint to achieve fast and high-performance bonding of single crystal superalloys. A mechanism of alternate epitaxial growth between two adjacent grains was found, which controls the formation and degree of the mortise-tenon. The causal relationship between the degree of the mortise-tenon and the heating rate was elucidated. With the degree of the mortise-tenon increasing, the interlocking effect of the mortise-tenon boundaries was enhanced. Benefited from the interlocking effects of the mortise-tenon boundaries, the joint acquired a tensile strength equal to that of the base material at 980°C and a rupture lifetime increased by 4.6 times under the stress of 147 MPa.
期刊介绍：
Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.
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