澳洲代写assignment:ARCAM电子束熔化。作为一家成立于1997年的瑞典公司，ARCAM专注于电子束熔化(EBM)技术的机器。该技术将金属粉末加热，并将其作为真空中的粉末床，利用与电子显微镜相同的电子束能量源，多层形成并熔化。在所有AM技术中，循证医学方法应用最广泛(Huang et al.， 2013)。接下来澳洲代写assignment专家将为留学生们讲解下ARCAM电子束熔化。
ARCAM的机器的最新报价服务于许多行业，并被称为A1和A2。该公司有一个特殊的A1建筑用于医疗用途，而A2建筑用于航空航天和相关工业部门。此外，每一种设备都可以通过电子束提供大约3500瓦的功率。A1和A2的最大容积为200 × 200 × 180 mm和200 × 200 × 350 mm (Frazier, 2014)。这些机器是在真空中使用的。利用多束新技术，电子束成功地同时扫描了所有1到100个点。ARCAM提供的材料包括CoCr、CP Ti、ELI Ti和Ti- 6a1 – 4v，而其他许多材料仍在开发中。
从市场来看，EBM在医疗行业有多种应用，ARCAM专门为医疗行业推出了A1机器(Bikas et al.， 2016)。ARCAM在意大利与Adler Ortho公司合作，开发通过制造髋臼杯来辅助髋关节植入的技术。自2007年以来，生产了超过10000个髋关节假体，超过1000个假体，得到了医生的积极反馈。
除了髋关节假体外，还可以利用EBM方法定制面部和膝关节假体。航空航天工业也受益于这些方法的应用(Frazier, 2014)。
意大利航空航天公司Avio与ARCAM合作，开发制造金属间化合物元素的能力，用于高温发动机的涡轮叶片或其他方面。这是一个至关重要的进步，因为TiA1是一种有用的高温材料。但由于其整体金属间化合物结构，加工难度大，脆性大。这些金属间化合物元素为利用AM加工形状以实现新的工程进步提供了范例(Vaezi等人，2013年)。
使用这项技术的一个主要好处是，建造的舱室温度在700摄氏度到1000摄氏度之间。这导致在特定的循环中，由于小水平的冷却，在零件中引起的应力降低。结果表明，采用EBM工艺加工Ti-6A1-4V具有相当的延伸率和极限拉伸强度。与此方法相关的另一个好处是，与激光下的粉末床系统相比，它的构建速度更快(Wong和Hernandez, 2012)。然而，EBM零件的表面粗糙度较高，在许多应用中存在后加工的必要性。
The latest offers of machines by ARCAM are serving many industries, and are termed as A1 and A2. The company has a specific building of A1 for medical purposes while A2 is established for aerospace and related industrial sectors. Further there is equipment of each through an electron beam providing power worth almost 3,500 Watts. The maximum volume capacity of A1 and A2 are 200 x 200 x 180 mm and 200 x 200 x 350 mm (Frazier, 2014). The machines are used in a vacuum. Using the new technology of multiple beams, the electron beam is successful in scanning all 1 to 100 spots at the same time. The availability of materials from ARCAM includes CoCr, CP Ti, ELI Ti, and Ti-6A1-4V, while many others are still developed.
When viewing the market, there are various applications of EBM for the medical industry and ARCAM introduced A1 machine specifically for serving the medical industry (Bikas et al., 2016). ARCAM works collaboratively in Italy with Adler Ortho for the development of technology to assist hip implants by making acetabular cup. Since the year 2007, manufacturing has been done of more than 10,000 hip implants and over 1,000 implantations with the positive feedback of doctors.
Apart from hip implants, these can be customized manufacturing of facial and knee implants by utilizing the EBM methods. The aerospace industry also benefits from the application of these methods (Frazier, 2014).
An aerospace company of Italy, Avio, works collaboratively with ARCAM for the development of capabilities in manufacturing intermetallic elements for purposes such as turbine blade or additional aspects of engines with high temperature. This is a crucial advancement as TiA1 is a useful material for high temperature. However, because of the overall intermetallic structure, its machining is difficult and brittle. Such intermetallic elements provide exemplary examples about the processing of shapes by the use of AM to enable new engineering advancements (Vaezi et al., 2013).
A primary benefit of using this technology is that the chamber built is considerably hot between 700 degrees Celsius and 1,000 degrees Celsius. This results in lowering stresses induced in parts due to small levels of cooling in the specific cycle. It is reflected that processing Ti-6A1-4V by the use of EBM process involves comparable elongation properties and ultimate tensile strength. An additional benefit related to this method is that its build rate is faster in comparison with powder bed systems under the presence of laser (Wong and Hernandez, 2012). However, the roughness of surface for parts of EBM is higher and necessity of post-machining for a number of applications is present.
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