摘要
针对镁/铝复合板在轧制过程中接触界面极易生成镁/铝金属间化合物,导致界面结合强度降低的问题,采用“冷喷涂镍中间层+热轧”工艺制备出铝/镁/铝复合板。研究不同压下率对复合板界面微观结构和力学性能的影响。结果表明,“冷喷涂镍中间层+热轧”工艺可有效抑制轧制过程中镁/铝金属间化合物的生成。随着压下率的增加,复合板界面原子扩散层厚度增加,界面结合强度随之增加。当压下率为45%时,界面结合强度达到最高为33.03 MPa。当压下率为35%时,复合板的极限抗拉强度和断裂伸长率达到峰值,分别为328.1 MPa和8.6%,呈现出最优的拉伸性能。当压下率为25%时,由于界面结合强度较低,镁/铝复合板界面在拉伸断裂后出现较严重的分层现象。
Aiming at the problem that the contact interface of magnesium/aluminium composite plates is very easy to generate magnesium/aluminium intermetallic compounds during the rolling process,resulting in the reduction of the interfacial bond strength,the aluminium/magnesium/aluminium composite plates were prepared by the process of“cold spraying nickel interlayer+hot rolling”,the effects of differ-ent reduction ratios on the interface microstructure and mechanical properties of the composite plates were studied.The results show that the“cold spraying nickel interlayer+hot rolling”process can effectively inhibit the generation of magnesium/aluminium intermetallic com-pounds during the rolling process.With the increase of the reduction ratio,the thickness of the atomic diffusion layer at the interface of the composite plate increases,and the interfacial bond strength increases.When the reduction ratio is 45%,the interfacial bond strength reaches the maximum of 33.03 MPa.When the reduction ratio is 35%,the ultimate tensile strength and elongation at break of the com-posite plate reach the peak with 328.1 MPa and 8.6%,respectively,presenting the optimum tensile properties.When the reduction ratio is 25%,the magnesium/aluminium composite plates interface shows more serious delamination after tensile fracture due to the low interfa-cial bond strength.
作者
吕家东
王潇洒
陈鹏
马晓宝
王涛
王向宇
黄庆学
LÜJia-dong;WANG Xiao-sa;CHEN Peng;MA Xiao-bao;WANG Tao;WANG Xiang-yu;HUANG Qing-xue(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment,Ministry of Education,Taiyuan 030024,China;National Key Laboratory of Metal Forming Technology and Heavy Equipment,Taiyuan 030024,China;Shanxi TISCO Stainless Steel Precision Strip Co.,Ltd.,Taiyuan 030024,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2024年第12期52-60,共9页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(52305404,52305405)
山西省基础研究计划(自由探索类)(202303021212053)
金属成形技术与重型装备全国重点实验室开放课题(S2308100.W22)
海安太原理工大学先进制造与智能装备产业研究院开放研发项目(2023HA-TYUTKFYF035)。
关键词
镁/铝复合板
冷喷涂
热轧
界面微观结构
力学性能
magnesium/aluminium composite plates
cold spraying
hot rolling
interface microstructure
mechanical property
