Static Properties of Direct Metal Laser Sintered (DMLS) Titanium Alloy (Ti6Al4V) and the Influence of Machining and Hot Isostatic Pressure (HIP) Treatment

摘要

The only statistical comparison which showed no significant difference was the tensile strength between Groups a and b (p＞0.05). The HIP treatment had a slight impact on the static properties, however, this treatment increases the fatigue limit of a machined sample by 57% (rotating beam fatigue). The microstructure images show that AM may not completely densify the material. However, the HIP process can be utilized to create a void free part (Figure 1). Machining the sample had a far greater impact on static properties than did the HIP process. Due to the notch sensitivity of Ti6Al4V, the characteristics of the DMLS surface reduced the static mechanical performance of the material.