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首页> 外文会议>STP 1471; Symposium on Titanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications; 20051109-10; Washington,DC(US) >Comparison of Stress Corrosion Cracking and Corrosion Fatigue (Anodized and Non-Anodized Grade 4 CP Ti)
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Comparison of Stress Corrosion Cracking and Corrosion Fatigue (Anodized and Non-Anodized Grade 4 CP Ti)

机译：应力腐蚀开裂和腐蚀疲劳的比较（阳极氧化和非阳极氧化4 CP Ti）

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摘要

In light of the possible effects of anodization on stress corrosion cracking (SCC) and corrosion fatigue (CF) of CP titanium, a research project has been completed recently in our laboratories to evaluate and compare SCC and CF of anodized versus non-anodized samples from a single lot of Grade 4 CPTi. Initial evaluation of alloy composition, microstructure, Vickers microhardness, and mechanical properties including the tensile and yield strength, % elongation and reduction of area was performed. After these tests ensured the material met the standards of ASTM Standard Specification for Unalloyed Titanium for Surgical Implant Applications (F 67), samples were prepared using low stress grinding techniques. Samples were divided into two groups, and the non-anodized SCC and CF testing was initiated. The surface of the second group of samples was anodized by Synthes to provide a green/gold surface consistent with standard production processing and then tested using the identical methodology as used for the non-anodized samples. Results of the slow strain rate SCC testing on both smooth and notched anodized and non-anodized samples in both distilled de-ionized water and Ringers solution at 37℃ showed no effect of anodization. Results of corrosion fatigue testing indicated that, while there was no effect of anodization on corrosion fatigue, there was a significant effect of the notch on the fatigue characteristics regardless of the two different surface conditions.
机译：考虑到阳极氧化对CP钛的应力腐蚀开裂（SCC）和腐蚀疲劳（CF）的可能影响，我们实验室最近完成了一项研究项目，以评估和比较阳极氧化和未阳极氧化样品的SCC和CF一批4级CPTi。对合金成分，显微组织，维氏显微硬度以及包括拉伸强度和屈服强度，％延伸率和面积减小在内的机械性能进行了初步评估。经过这些测试，确保材料符合ASTM标准的《用于外科植入应用的非合金钛的标准规范》（F 67）之后，使用低应力研磨技术制备样品。将样品分为两组，并开始未阳极氧化的SCC和CF测试。第二组样品的表面通过Synthes进行阳极氧化处理，以提供与标准生产工艺一致的绿色/金色表面，然后使用与非阳极化样品相同的方法进行测试。在37℃的蒸馏去离子水和林格溶液中，对平滑，带凹口的阳极氧化和未阳极氧化的样品进行慢应变速率SCC测试的结果均显示，阳极氧化没有影响。腐蚀疲劳试验的结果表明，尽管阳极氧化对腐蚀疲劳没有影响，但无论两个不同的表面条件如何，缺口对疲劳特性都有显着影响。

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