Application of X-ray Digital Imaging Technology in the Quality Inspection of Casting and Alloys
Author of the article:WANG Linrui;WANG Kai;HE Naijun;CHEN Jianjun;QIU Xiaoxiang
Author's Workplace：College of Materials Science and Engineering,Chongqing Universtiy,Chongqing 400044,China;Chongqing Hongqi Cylinder Head Manufacturing Co.,Ltd.,Chongqing 402760,China;Chongqing Gaokin Industrial Co.,Ltd.,Chongqing 401122,China
Key Words：X-ray digital radiography nondestructive inspection casting intergranular defects microstructure
Abstract：Based on the important role of the X-ray digital(DR)imaging technique in the quality inspection of casting products.The internal micro-defects of 7075 aluminum alloy castings,the internal composition and microstructure uniformity of 7075 aluminum alloy were investigated.The results show that the high-resolution DR can identify small-sized intergranular shrinkage defects,and that the grayscale and its distribution of the DR image are relate to the uniform of the alloy composition and microstructure.Ni-containing 7075 aluminum alloy exhibits higher strength and more elongation for its fewer intergranular defects and more uniform chemical composition comparing with 7075 aluminum alloy.Obviously,high-resolution DR exhibits a positive effect on accelerating the development of advanced materials and novel products.
