摘要
用电沉积法制备了Al2O3/Ni-Mn纳米复合材料,在不同温度和应变速率下进行了超塑拉伸试验和超塑胀形试验,并对该复合材料的断口进行了分析。结果表明,在超塑温度500℃、应变速率1.67×10-3s-1下,该复合材料的最大伸长率为530%;氧化铝颗粒的加入不仅细化了材料的晶粒,更提高了材料的韧性;在材料受热时,氧化铝颗粒对材料的晶粒长大有一定的抑制作用;该复合材料的最大相对胀形高度,即高径比达到1.616。
Al2O3 /Ni-Mn nano-composite was produced by pulse electrodeposition.The superplasticity tensile and superplasticity bulging test were carried out under different temperature and strain rate.The results show that,the largest elongation is 530% under superplasticity temperature of 500 ℃ and strain rate of 1.67 × 10-3 s-1.Al2O3 particles refine the grains and toughen the material;when heated,Al2O3 particles suppress the grain growth.The biggest relative bulging height,which is defined as dome apex height over the die inner radius,is obtained in the gas bulging test,it is 1.616.
出处
《热加工工艺》
CSCD
北大核心
2011年第2期73-75,共3页
Hot Working Technology
基金
国家自然科学基金资助项目(50605016)
哈工大科研创新基金资助项目(HIT.NSRIF.2008.37)
关键词
电沉积
纳米复合材料
超塑性
electrodeposition
nano-composite
superplasticity
