A comparative study of mechanical properties and machinability of wrought and additive manufactured (selective laser melting) titanium alloy - Ti-6Al-4V
A comparative study of mechanical properties and machinability of wrought and additive manufactured (selective laser melting) titanium alloy - Ti-6Al-4V
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DOI：
10.1108/rpj-08-2015-0105
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发表时间：
2017-01-01
影响因子：
3.9
通讯作者：
Littlefair, Guy
中科院分区：
文献类型：
--
作者：
Shunmugavel, Manikandakumar;Polishetty, Ashwin;Littlefair, Guy
目的 - 本文的目的是研究并比较增材制造的钛合金 Ti-6Al-4V 与传统生产的变形钛合金 Ti-6Al-4V 的机械性能和切削加工特性。研究了屈服强度、极限抗拉强度、显微硬度、伸长率等机械性能的差异及其对切削力和表面粗糙度等切削性能的影响。研究发现，由于其独特的针状微观结构，SLM Ti-6Al-4V 比锻造 Ti-6Al-4V 具有更高的强度和硬度，显着影响切削力和表面粗糙度。由于强度、硬度和延展性方面的差异，增材制造部件与锻造部件相比，在机械加工过程中观察到高切削力和低表面粗糙度。 设计/方法/途径 - 对锻造和增材制造的 Ti-6Al-4V 机械性能（如屈服强度、极限抗拉强度、硬度和伸长率）以及机械性能（如切削力和表面粗糙度）进行了研究。结果 - 与增材制造部件相比，增材制造部件的机械性能（如屈服强度、极限抗拉强度和硬度）更高锻造部件。然而，与锻造零件相比，增材制造的零件明显缺乏延展性。在加工方面，由于这些不同加工材料的机械性能差异，与锻造零件相比，增材制造的 Ti-6Al-4V 具有更高的切削力和更低的表面粗糙度。原创性/价值 - 本文首次讨论了增材制造的 Ti-6Al-4V 的加工能力。
Purpose - The purpose of this paper is to study and compare the mechanical properties and machinability characteristics of additive manufactured titanium alloy Ti-6Al-4V with conventionally produced wrought titanium alloy, Ti-6Al-4V. The difference in mechanical properties such as yield strength, ultimate tensile strength, micro hardness, percentage of elongation and their effect on machinability characteristics like cutting forces and surface roughness are studied. It was found that higher strength and hardness of SLM Ti-6Al-4V compared to wrought Ti-6Al-4V owing to its peculiar acicular microstructure significantly affected the cutting forces and surface roughness. High cutting forces and low surface roughness were observed during machining of additive manufactured components compared to its wrought counterpart because of their difference in strength, hardness and ductility.Design/methodology/approach - Mechanical properties like yield strength, ultimate tensile strength, hardness and percentage of elongation and machinability characteristics like cutting forces and surface roughness were studied for both wrought and additive manufactured Ti-6Al-4V.Findings - Mechanical properties like yield strength, ultimate tensile strength and hardness were higher for additive manufactured components as compared to the wrought component. However additive manufactured components significantly lacked in ductility as compared to the wrought parts. Concerning machining, higher cutting forces and lower surface roughness were observed in additive manufactured Ti-6Al-4V compared to the wrought part as a result of differences in mechanical properties of these differently processed materials.Originality/value - This paper, for the first time, discusses the machining capabilities of additive manufactured Ti-6Al-4V.