Effects of titanium addition on mechanical and corrosion behaviours of AZ91 magnesium alloy
Effects of titanium addition on mechanical and corrosion behaviours of AZ91 magnesium alloy
复制标题
DOI：
10.1016/j.jallcom.2010.10.100
复制
发表时间：
2011-02-03
影响因子：
6.2
通讯作者：
Candan, E.
中科院分区：
文献类型：
--
作者：
Candan, S.;Unal, M.;Candan, E.
研究了含0.2~0.5wt.%Ti的AZ91镁合金的力学性能和腐蚀行为。结果表明，钛的加入可使材料的极限抗拉强度提高18%，屈服强度提高47%。通过浸泡试验和动电位极化测试评价了其在3.5%NaC l溶液中的腐蚀行为。浸泡试验和动电位极化测试结果表明，随着合金中钛含量的增加，AZ91合金的耐蚀性逐渐提高。与AZ91合金相比，添加0.5Ti后，合金的耐蚀性提高了45倍。AZ91合金性能改善的机制是由于钛的加入抑制了部分离异的β-Mg17Al12共晶，增加了α-镁固溶体中的Al含量。(C)2010爱思唯尔B.V.保留所有权利。
The mechanical properties and corrosion behaviour of AZ91 magnesium alloy containing 0.2-0.5 wt.% Ti were investigated in this study. Results demonstrate that the enhancement of the ultimate tensile strength by 18% and yield strength by 47% can be achieved by Ti addition. The corrosion behaviour was evaluated by immersion tests and potentiodynamic polarisation measurements in 3.5% NaCl solution. The results from the immersion tests and potentiodynamic polarisation measurements showed that the corrosion resistance of AZ91 alloy increased progressively with the increase of the Ti content of the alloy. Compared to AZ91 alloy, 0.5Ti addition increased the corrosion resistance by up to 45 fold. The mechanism of property enhancement is ascribed to both the suppression of partially divorced beta-Mg17Al12 eutectics and an increased Al content in alpha-Mg solid solution by Ti addition in AZ91 alloy. (C) 2010 Elsevier B.V. All rights reserved.