典型文献
Effect of Gd content on hot-tearing susceptibility of Mg-6Zn-xGd casting alloys
文献摘要：
The hot-tearing susceptibility (HTS) of Mg-6Zn-xGd (x=0.5, 1, 2, 3, 4, 6) alloys was evaluated using a constrained rod casting (CRC) method. The results show that the HTS curve follows a typical "Λ" shape with the increase of Gd content. The Mg-6Zn-2Gd alloy has the highest while Mg-6Zn-6Gd alloy has the lowest HTS value. The hot-tearing behavior characteristics of Mg-6Zn-xGd alloys were further studied through a multifunctional hot-tearing test device. According to the dendrite contact point inferred from the stress curve, the Clyne-Davies criterion was modified and found to be accurate in predicting the HTS of Mg-6Zn-xGd alloys. Microstructure observation reveals that the grain size and the volume of eutectic liquid are the two key factors affecting HTS of Mg-6Zn-xGd alloys. The large grain with columnar structure can easily promote initiation and propagation of hot-tearing due to the poor feeding and coordinating deformation capability, which have a harmful effect on HTS. A higher volume fraction of eutectic phase can refill the cracking and provide continuous feeding channels by dendrite bridge and thicker liquid film, thus increase the hot-tearing resistance.
文献关键词：
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作者姓名：
He Qin;Guang-yu Yang;Xun-wei Zheng;Shi-feng Luo;Tong Bai;Wan-qi Jie
作者机构：
State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China;Dongfeng Nissan Aeolus Xiangyang Automobile Co.,Ltd.,Xiangyang 441100,Hubei,China
文献出处：
引用格式：
[1]He Qin;Guang-yu Yang;Xun-wei Zheng;Shi-feng Luo;Tong Bai;Wan-qi Jie-.Effect of Gd content on hot-tearing susceptibility of Mg-6Zn-xGd casting alloys)[J].中国铸造,2022(02):131-139
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Effect,content,hot,tearing,susceptibility,Mg,6Zn,xGd,casting,alloys,HTS,was,evaluated,using,constrained,rod,CRC,method,results,show,that,curve,follows,typical,shape,increase,2Gd,highest,while,6Gd,lowest,value,behavior,characteristics,were,further,studied,through,multifunctional,test,device,According,dendrite,contact,point,inferred,from,stress,Clyne,Davies,criterion,modified,found,accurate,predicting,Microstructure,observation,reveals,grain,size,volume,eutectic,liquid,are,two,key,factors,affecting,large,columnar,can,easily,promote,initiation,propagation,due,poor,feeding,coordinating,deformation,capability,which,have,harmful,effect,higher,fraction,phase,refill,cracking,provide,continuous,channels,by,bridge,thicker,film,thus,resistance
AB值：
0.539701
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