Mai Phuong Thao, Bormann Therese, Sonntag Robert, Kretzer Jan Philippe, Gibmeier Jens
Institute for Applied Materials, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
Laboratory of Biomechanics and Implant Research, Clinic for Orthopedics and Trauma Surgery, Heidelberg University Hospital, 69118 Heidelberg, Germany.
Materials (Basel). 2020 Nov 4;13(21):4948. doi: 10.3390/ma13214948.
Due to its mechanical properties and good biocompatibility, Ti6Al4V ELI (extra low interstitials) is widely used in medical technology, especially as material for implants. The specific microstructures that are approved for this purpose are listed in the standard ISO 20160:2006. Inductive short-term heat treatment is suitable for the adjustment of near-surface component properties such as residual stress conditions. A systematic evaluation of the Ti6Al4V microstructures resulting from short-term heat treatment is presently missing. In order to assess the parameter field that leads to suitable microstructures for load-bearing implants, dilatometer experiments have been conducted. For this purpose, dilatometer experiments with heating rates up to 1000 °C/s, holding times between 0.5 and 30 s and cooling rates of 100 and 1000 °C/s were systematically examined in the present study. Temperatures up to 950 °C and a holding time of 0.5 s led to microstructures, which are approved for medical applications according to the standard ISO 20160:2006. Below 950 °C, longer holding times can also be selected.
由于其机械性能和良好的生物相容性,Ti6Al4V ELI(超低间隙)在医疗技术中被广泛使用,尤其是作为植入物的材料。为此目的被批准的特定微观结构列于标准ISO 20160:2006中。感应短期热处理适用于调整近表面部件性能,如残余应力状态。目前缺少对短期热处理产生的Ti6Al4V微观结构的系统评估。为了评估导致适用于承重植入物的微观结构的参数范围,进行了膨胀仪实验。为此,在本研究中系统地研究了加热速率高达1000℃/s、保温时间在0.5至30秒之间以及冷却速率为100和1000℃/s的膨胀仪实验。温度高达950℃且保温时间为0.5秒会产生符合标准ISO 20160:2006医疗应用批准的微观结构。在950℃以下,也可以选择更长的保温时间。