為了加速開發多元素為主的高熵合金，本研究以相圖計算方法(CALPHAD)輔以高通量技術(High-throughput computation)，以Lever rule及Scheil model模擬Al-Cr-Fe-Ti-V輕量高熵合金。分析計算結果，V元素有助於合金BCC相的生成，Fe和Ti則易使介金屬化合物的析出。在未來應用的本考量下，自模擬結果中挑選六組合金實驗，預期皆為BCC單相。
將電弧熔煉法製備的鑄態合金，及1100℃高溫固溶處理的試片，以X光繞射儀(XRD)和場發射電子微探儀(FE-EPMA)，檢視與驗證模擬計算之準確性。從各項結果分析，本研究中六個合金都是以BCC相為主，因實驗誤差而導致部分合金有Laves C14的析出。整體來說，實驗的結果與計算模擬相當吻合。密度測量結果說明六組合金皆屬於輕量高熵合金，隨著Ti和V的添加有助於降低整體密度。本研究中合金的硬度皆比傳統鈦合金來的高，有Laves_C14析出的合金可明顯提升其硬度，此外藉由Ti元素比例的增加也有正面的影響。

To accelerate the development of high-entropy alloy, this study uses the Calculation of Phase Diagram method (CALPHAD) supplemented by the high-throughput computation (HTC), with Lever rule and Scheil model to simulate Al-Cr-Fe-Ti-V Light-Weight High-Entropy Alloy. According to the analysis of calculation results, Vanadium contributes to the formation of BCC phase, and Fe and Ti tend to cause the precipitation of intermetallic compounds. Under the consideration of the application cost, the Alloy 1~6 are selected from the simulation results, which are expected to be BCC single-phase.
The as-cast alloys prepared by arc melter and the alloys treated at 1100℃ were examined by the X-ray Diffractometer (XRD) and Field-Emission Electron Probe Microanalyzer (FE-EPMA). From the analysis of results, the six alloys are mainly the BCC phase, and Laves C14 precipitates in some alloys due to experimental deviation. Overall, the experimental results are in good agreement with the computational simulation. Density results indicate that all six alloys are Light-Weight High-Entropy Alloy. The addition of Ti and V, it reduces the overall density. In this study, all hardness of alloys is higher than the traditional titanium alloy. The alloy precipitated with the Laves C14 phase can significantly increase its hardness. Also, the increase in the proportion of Ti element has a positive effect on hardness.

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