Researchers at皇家墨尔本理工学院（RMIT）在澳大利亚试用了一种新材料，用于将钛合金与铜合并结合的金属3D打印。
Developed by RMIT’s School of Engineering, titanium-copper alloys were created in a bid to prevent cracking and distortion that can affect titanium when 3D printing. RMIT states that the material can potentially lead to a new range of high-performance alloys for medical device and aerospace applications.
The collaborative project involved leading researchers in the area of alloy composition and grain microstructure from RMIT University,CSIRO,昆士兰州大学and the俄亥俄州立大学。Their findings were published in the science journalNature。
钛中的3D打印问题
Titanium alloys are widely used in the additive manufacturing industry for a number of applications and verticals. Often, it is used to manufacture components and products foraerospace,medical,汽车和更多。但是，RMIT解释说，当当前在增材制造市场中使用的钛合金产品时，用户的3D打印组件容易出现破裂和失真。雷电竞充值
其原因是RMIT论文所述，“固有的高冷却速率和融合基金属添加剂制造过程的高热梯度”。雷电竞充值这可能导致非常细的微观结构，并导致钛合金在柱状晶体中冷却并粘合在一起，从而导致裂纹或变形。此外，RMIT解释说，没有用于钛的商业谷物炼油厂，这将使制造商能够完善材料的微观结构并避免并发症。
用铜覆盖负面影响
RMIT’s solution to the problem was combining titanium alloys with copper. Copper has proven to be a difficult material to process with additive manufacturing as it reflects the heat applied by a laser beam. Nevertheless, various firms includingGE Additive,Optomec， 和protolabs最近发布了用于3D打印的铜材料和服务。
根据该论文，这些钛合金合金配备了高宪法过冷容量，这是由于合金元素在固化过程中的分配而引起的。这使得材料可以覆盖由添加剂制造过程中激光熔点区域中高热梯度引起的任何负面影响。雷电竞充值
As a result, Professor Mark Easton from RMIT University’s School of Engineering states that objects 3D printed with the titanium–copper alloy portray “exceptional properties” without any special process control or additional treatment. “Of particular note was its fully equiaxed grain structure: this means the crystal grains had grown equally in all directions to form a strong bond, instead of in columns, which can lead to weak points liable to cracking.”
“Alloys with this microstructure can withstand much higher forces and will be much less likely to have defects, such as cracking or distortion during manufacture.”
从他们的发现，研究人员还建议，可以以相同的方式处理其他合金，以改善通过3D打印处理的特性：“一般而言，它打开了开发新的基于钛合金的新系列的可能性。CSIRO高级研究科学家Mark Gibson博士补充说，为3D打印开发了。
Researchers at RMIT have demonstrated continued research output in the field of metal 3D printing. In February, a PhD candidate at the university won a $15 thousand AUD ($10 thousand USD) prize for proving the工具钢的3D可打印能力。RMIT还领导了一个试图将金属3D打印应用于为澳大利亚国防军服务。
“雷电竞充值超铁粒高强度钛合金的增材制造” is written by Duyao Zhang, Dong Qiu, Mark A. Gibson, Yufeng Zheng, Hamish L. Fraser, David H. StJohn and Mark A. Easton. It is published inNature与DOI 10.1038/S41586-019-1783-1。
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Featured image shows titanium and copper powder with 3D printed bars. Photo via RMIT.
