Processing metallic glasses by selective laser melting
Processing metallic glasses by selective laser melting
复制标题
DOI：
10.1016/j.mattod.2013.01.018
复制
发表时间：
2013-01-01
期刊：
影响因子：
24.2
通讯作者：
Eckert, Juergen
中科院分区：
文献类型：
--
作者：
Pauly, Simon;Loeber, Lukas;Eckert, Juergen
金属玻璃及其后代，即所谓的大块金属玻璃(BMG)，可以看作是具有很高抗晶化能力的冷冻液体。传统结构的缺乏使它们成为一种具有接近理论强度、低杨氏模数和大弹性的材料。只有当金属熔体快速冷却以绕过晶体的形核和生长时，才能获得这些独特的机械性能。大多数已知和使用的加工路线，如铸造、熔融纺丝或气体雾化，在几何形状的复杂性和尺寸方面都有固有的局限性。研究表明，通常用于加工常规金属合金和聚合物的选择性激光熔化(SLM)技术可用于制造复杂几何形状和成分的铁基金属玻璃。这种方法原则上适用于多种金属合金，并为新材料的合成和具有先进的功能和结构特性的部件的开发铺平了道路，而不受尺寸和复杂性的限制。
Metallic glasses and their descendants, the so-called bulk metallic glasses (BMGs), can be regarded as frozen liquids with a high resistance to crystallization. The lack of a conventional structure turns them into a material exhibiting near-theoretical strength, low Young's modulus and large elasticity. These unique mechanical properties can be only obtained when the metallic melts are rapidly cooled to bypass the nucleation and growth of crystals. Most of the commonly known and used processing routes, such as casting, melt spinning or gas atomization, have intrinsic limitations regarding the complexity and dimensions of the geometries. Here, it is shown that selective laser melting (SLM), which is usually used to process conventional metallic alloys and polymers, can be applied to implement complex geometries and components from an Fe-base metallic glass. This approach is in principle viable for a large variety of metallic alloys and paves the way for the novel synthesis of materials and the development of parts with advanced functional and structural properties without limitations in size and intricacy.