Additive manufacturing of high-strength eutectic aluminium-nickel alloys – Processing and mechanical properties
Additive manufacturing of high-strength eutectic aluminium-nickel alloys – Processing and mechanical properties
复制标题
高强度共晶铝镍合金的增材制造——加工和机械性能
DOI：
10.1016/j.jmatprotec.2021.117315
复制
发表时间：
2021
影响因子：
6.3
通讯作者：
J. Schleifenbaum
中科院分区：
文献类型：
--
作者：
G. Rödler;F. G. Fischer;J. Preußner;Valérie Friedmann;C. Fischer;A. Weisheit;J. Schleifenbaum
由于目前可用的合金缺乏可加工性或经济可行性，增材制造的高强度铝基合金的应用受到限制。在这项工作中，首次研究了增材制造的共晶 Al-Ni 合金的机械性能。 Al-7.5 wt. 的平均极限拉伸强度为 545 MPa，断裂伸长率为 10.1%。 % Ni-2.0 重量% Cu (AlNi7.5Cu2.0) 是作者所知的第一种采用激光粉末床熔融 (LPBF) 加工的铝基合金，其极限拉伸强度超过 500 MPa，断裂伸长率超过 10%，同时依赖于经济上可行的合金策略和元素（即不添加稀土元素，例如 Sc）。所研究合金的性能被认为是 α-铝相和金属间 Al3Ni 相的结果，该相包含共晶以及由于 LPBF 工艺中使用的冷却速率而产生的超细层间距。本工作研究的具体合金成分是 Al-7.5 wt。 % Ni (AlNi7.5), Al-7.5 重量% Ni-0.5 重量% Cu (AlNi7.5Cu0.5) 和 AlNi7.5Cu2.0。所有合金均采用 LPBF 制造，零件密度 >99.9%，无裂纹。对于二元 AlNi7.5 合金，在增材制造条件下，断裂伸长率为 5.4% 时测得的平均极限拉伸强度为 484 MPa。通过添加最多 2.0 重量％，测定的机械性能不断提高。 ％ 铜。
The application of additively manufactured high strength aluminium base alloys is, among others limited due to either a lack in processability or economic feasibility with the alloys currently available. Within this work, the mechanical properties of additively manufactured eutectic Al-Ni alloys are investigated for the first time. With an average ultimate tensile strength of 545 MPa at an elongation at failure of 10.1 %, Al-7.5 wt. % Ni-2.0 wt. % Cu (AlNi7.5Cu2.0) is the first aluminium base alloy known to the authors that has been processed with Laser Powder Bed Fusion (LPBF) and surpasses an ultimate tensile strength of 500 MPa and an elongation at failure of 10 % while relying on economically feasible alloying strategies and elements (i.e. no addition of rare earth elements, such as Sc). The properties of the alloys investigated are assumed to be a consequence of the α-aluminium- and intermetallic Al3Ni-phase comprising the eutectic in combination with an ultrafine interlamellar spacing as a result of the cooling rates utilized in the LPBF process. The specific alloy compositions investigated in this work are Al-7.5 wt. % Ni (AlNi7.5), Al-7.5 wt. % Ni-0.5 wt. % Cu (AlNi7.5Cu0.5) and AlNi7.5Cu2.0. All alloys were manufactured crack free by LPBF with part densities >99.9 %. For the binary AlNi7.5 alloy, an average ultimate tensile strength of 484 MPa was determined at an elongation at failure of 5.4 % in the additively manufactured condition. The determined mechanical properties were continuously increased by addition of up to 2.0 wt. % copper.
DOI：
10.1007/s40192-019-00130-x
发表时间：
2019-06-01
影响因子：
3.3
作者：
Gan, Zhengtao;Lian, Yanping;Wagner, Gregory J.
通讯作者：
Wagner, Gregory J.