Effect of cryogenic and aging treatments on low-energy impact behaviour of Ti-6Al-4V alloy  

深冷和时效处理对Ti-6Al-4V合金低能冲击行为的影响（英文）

作　　者：Y. PEKBEY K. ASLANTAS Y. PEKBEY N.YUMAK;K.ASLANTAS;Y.PEKBEY(Department of Mechanical Engineering,University of Afyon Kocatepe,Afyon-03000,Turkey;Department of Mechanical Engineering,University of Ege,İzmir-35030,Turkey)

机构地区：[1]Department of Mechanical Engineering, University of Afyon Kocatepe, Afyon-03000, Turkey [2]Department of Mechanical Engineering, University of Ege, 輟mir-35030, Turkey [3]Department of Mechanical Engineering, University of Ege, Izmir-35030, Turkey

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第3期514-526,共13页中国有色金属学报（英文版）

摘　　要：The objective of this study is to examine the effects of cryogenic and aging treatments on the impact strength andmechanical properties of Ti?6Al?4V alloy.To accomplish that objective,cryogenic treatment(CT),aging treatment(AT)andcryogenic treatment followed by aging treatment(CAT)were conducted on Ti?6Al?4V alloy.Impact tests were performed onheat-treated and untreated samples using different impactor nose geometries(hemispherical,60°and90°conical)to determine theeffect of impactor nose geometry on the damage characteristic.The findings showed that energy absorption increased and areas ofdamage decreased as a result of heat treatment in all treated samples.The highest energy absorption was observed in the CATsamples,due to the increase in energy absorption,the smallest damaged area occurred in the CAT sample,and the largestdeformation was seen in the untreated samples.Additionally,it was seen that the damaged area and deflection were stronglydependent on impactor nose geometry.The maximum deflection and narrowest deformation area were seen with60o conical nosegeometry.The deformation area increased with increasing impactor nose angle.研究深冷和时效处理对Ti-6Al-4V合金冲击强度和力学性能的影响。对Ti-6Al-4V合金分别进行深冷处理(CT)、时效处理(AT)以及先深冷后时效处理(CAT)。用不同几何形状(半圆形、60°和90°锥角)的冲击头对经热处理和未经热处理Ti-6Al-4V样品进行冲击实验以考察冲击头几何形状对样品损伤特性的影响。结果表明,所有热处理样品吸收能量增加而损伤面积降低。由于吸收能量的增加,CAT样品具有最高的吸收能量和最小的损伤面积,而未经处理的样品出现最大变形。此外,冲击头的几何形状对样品的损伤面积和偏移量产生极大影响。使用60°锥角冲击头进行冲击实验的样品具有最大的偏移量(角)和最小变形面积。样品的变形面积随冲击头锥角的增大而增大。

关 键 词：Ti.6Al.4V alloy cryogenic treatment aging treatment low-energy impact test impact damage impactor nose geometry 

分 类 号：TG146.23[一般工业技术—材料科学与工程]