The dissimilar metal welding joint is connected by the metallurgical bond of intermetallic compounds at the interface. which easily causes stress concentration at the interface and cracks continuously along the interface. resulting in low reliability in impact environments. A novel multi-layer plug and bolt connection for TC4/7A52 dissimilar metal butt joints is proposed in this manus... https://danddcollectiblers.shop/product-category/seasonal/