Al-Cu合金的显微组织及其晶体生长方向（英文）

发布时间：2018-03-17 14:22

本文选题：Al-Cu合金　切入点：定向凝固　出处：《Transactions of Nonferrous Metals Society of China》2015年05期 　论文类型：期刊论文

【摘要】：研究金属型铸造(PMC)和定向凝固(DS)不同Cu含量Al-Cu的显微组织和晶体生长方向,同时,探讨浇铸温度对纯Al的显微组织和晶体生长方向的影响。结果表明,纯Al晶体并非始终保持胞状,而是随着浇铸温度的升高从胞状晶变为具有发达晶臂的柱状树枝晶,且晶体的生长方向也随之改变。Cu元素对PMC和DS Al-Cu合金显微组织的影响相似:随着Cu含量的增加,α(Al)晶体均从胞状晶依次转变为柱状晶、柱状树枝晶和发达的等轴晶。随着Cu含量的增加,PMC合金晶体的生长方向逐渐逼近(110)方向,但所形成的(110)向的晶体并不属于羽毛状晶体。在所有DS Al-Cu合金中也未发现羽毛状晶体。
[Abstract]:The microstructure and crystal growth direction of Al-Cu with different Cu content in metal mold casting and directionally solidified Al-Cu were studied. The effect of casting temperature on the microstructure and crystal growth direction of pure Al was discussed. Pure Al crystals do not always remain cellular, but change from cellular crystals to columnar dendrites with developed crystal arms as the casting temperature increases. The effect of element Cu on the microstructure of PMC and DS Al-Cu alloys is similar: with the increase of Cu content, the crystal changes from cellular to columnar. With the increase of Cu content, the growth direction of the columnar dendritic crystal and the developed equiaxed crystal is gradually approaching to the direction of C110), but the crystal formed in this direction does not belong to the featherlike crystal, and no feathered crystal has been found in all DS Al-Cu alloys.
【作者单位】：兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室;
【基金】：Project(51061010)supported by the National Natural Science Foundation of China Project(NCET-10-0023)supported by the Program for New Century Excellent Talents in University of China Project(J201103)supported by the Program for Hongliu Outstanding Talents of Lanzhou University of Technology,China
【分类号】：TG146.21

【参考文献】