调幅分解程度对Ni-32%Cu合金形变织构的影响  

Effect of spinodal decomposition degree on deformation texture of Ni-32%Cu alloy

作　　者：何亚利 王均安[1,2] 陈永充 张朦 陈崇林 贺英 HE Ya-li;WANG Jun-an;CHEN Yong-chong;ZHANG Meng;CHEN Chong-lin;HE Ying(School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China;Shanghai Key Laboratory of High Temperature Superconductors,Shanghai 200444,China)

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]上海市高温超导重点实验室,上海200444

出　　处：《材料热处理学报》2021年第6期65-72,共8页Transactions of Materials and Heat Treatment

基　　金：上海市高温超导重点实验室项目(14DZ2260700);上海大学科研培育基金项目。

摘　　要：采用等离子弧熔炼和真空感应重熔的方法制备了Ni-32%Cu合金坯锭,经热锻、热轧及退火得到实验用合金,将其置于350℃下保温0、1.5和4.0 h获得了3种不同调幅分解程度的Ni-32%Cu合金。这些合金经过总变形量为98%的冷轧后,采用X射线四环衍射仪,研究了调幅分解程度对Ni-32%Cu合金形变织构的影响。结果表明:Ni-32%Cu合金在350℃保温时发生了调幅分解,且随着保温时间的延长,合金的调幅分解程度增大。随着调幅分解程度的增加,Ni-32%Cu合金形变织构中S取向和C取向份额呈下降趋势,B取向份额呈上升趋势。这主要是因为调幅组织在形变时,只有少数的滑移系开动,促进了平面滑移,抑制了交滑移的进行;随着调幅分解程度的增加,调幅相所占比例增加,调幅相的存在对位错有钉扎作用,使得位错的可动性下降。A Ni-32%Cu alloy ingot was prepared by plasma arc melting and vacuum induction re-melting,and the experimental alloy was obtained by hot forging,hot rolling and annealing.Three kinds of Ni-32%Cu alloys with different spinodal decomposition degrees were obtained by holding at 350℃for 0 h,1.5 h and 4.0 h.The influence of spinodal decomposition degrees on the deformation texture of the Ni-32%Cu alloy after cold rolling with 98%deformation was studied by X-ray four-ring diffractometer.The results show that the spinodal decomposition of the Ni-32%Cu alloy occurs after holding at 350℃for different time,and the spinodal decomposition degree of the alloy increases with the increase of holding time.With the spinodal decomposition degree increases,the S and C texture components in the deformation texture of the Ni-32%Cu alloy sheets decrease,and the B texture component increases.This is mainly because only a few slip systems are activated during the deformation of spinodal structure,which promotes the planar slip and inhibits the cross-slip.With the increase of spinodal decomposition degrees,the proportion of spinodal phase increases,and the existence of spinodal phase has a pinning effect on the dislocation,which makes the dislocation mobility decrease.

关 键 词：Ni-32%Cu合金 调幅分解 形变织构 极图 取向分布函数(ODF) 

分 类 号：TG146.1[一般工业技术—材料科学与工程]