Influence of grain size and microstructure on oxidation rates in titanium alloy Ti-6Al-4V under superplastic forming conditions
Influence of grain size and microstructure on oxidation rates in titanium alloy Ti-6Al-4V under superplastic forming conditions
复制标题
超塑成形条件下钛合金Ti-6Al-4V晶粒尺寸和显微组织对氧化速率的影响
DOI：
10.1361/10599490421394
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发表时间：
2004
影响因子：
2.3
通讯作者：
M. Ramulu
中科院分区：
文献类型：
--
作者：
F. Pitt;M. Ramulu
两种不同晶粒尺寸的 Ti-6Al-4V (Ti-6-4) 板材暴露在代表超塑性成形 (SPF) 的时间和温度条件下。根据增重、α 层深度和显微硬度分布评估 SPF 条件对氧化速率的影响。响应的差异与两批 Ti-6-4 之间的晶粒尺寸差异有关。细晶粒 Ti-6Al-4V 在本研究中检查的所有三个区域（重量增加、α 层厚度和增加的显微硬度深度）中表现出更快的氧扩散。发现这些差异相对于制造过程中的扩散分析和处理而言是显着的。这项工作的结果支持使用细晶材料的降低温度 SPF 以及制造超塑部件的附带好处。
Ti-6Al-4V (Ti-6-4) sheets of two different grain sizes were exposed to time and temperature conditions representative of superplastic forming (SPF). The influence of SPF conditions on oxidation rates was evaluated in terms of weight gain, α-case depth, and microhardness profile. Differences in the response are related to the difference in grain size between the two lots of Ti-6-4. Fine grain Ti-6Al-4V exhibits faster oxygen diffusion in all three areas examined in this study, weight gain, α-case thickness, and increased microhardness depth. The differences were found to be significant relative to diffusion analysis and processing during manufacturing. Results from this work support reduced temperature SPF using fine grain material and the accompanying benefits in manufacturing superplastic parts.