薄带组爆炸焊动态响应与非晶块体制备

Dynamic response of multilayer and manufacturing of bulk metallic glass by explosive welding

基于急冷凝固技术制备的非晶合金尺寸局限性,拟通过爆炸焊接手段对薄带组进行面复合,以获得块体非晶合金。针对薄带组爆炸焊动态响应未获得充分认识,研究过程中首先根据质量、动量守恒导出薄带组在爆轰驱动下运动微分方程,建立爆轰产物流场与薄带组运动耦合关系式,从而认识薄带组动态响应,获得冲击动力学特征。最后考虑非晶薄带的脆性与亚稳态特性,通过涂层对薄带组进行保护,实现了非晶块体的制备。

Based on the limitations in manufacturing bulk metallic glass of large size,multi-layer amorphous foils were joined surface bonding by using explosive welding technology.It should be noted that the dynamic response of the muhilayer driven by explosion has not been thorough..ly know.The research processes can be described as follows.Firstly,the motion differential equation of muhilayer foils was deduced based on conservation laws of momentum and mass,thus the coupling relationship between the detonation production and the muhilayer motion was established.Then,the dynamic response and impact characteristics were calculated and revealed.After that taking account of amorphous foils with brittleness and metastable state,surfaces of amorphous foils were coated with nickel.Finally,explosive welding experiments was conducted,large size of bulk metallic glasses was obtained.