ZL101半固態(tài)微壓縮實驗研究
發(fā)布時間:2019-04-24 03:27
【摘要】:對ZL101合金進行不同溫度和保溫時間的重熔處理,獲得不同半固態(tài)組織狀態(tài),并進行常規(guī)尺寸(Φ5 mm)和微觀尺寸(Φ1 mm)試樣的等溫壓縮實驗,得到不同變形溫度和保溫時間下試樣的流變應(yīng)力曲線,通過兩種尺寸的力學性能比較,獲得半固態(tài)金屬在尺寸微型化的過程中尺度效應(yīng)的存在條件與存在形態(tài)。研究表明,ZL101鋁合金在常溫和高固相率條件下均存在著流動應(yīng)力增加的尺度效應(yīng)現(xiàn)象;在高固相率條件下流動應(yīng)力增大的現(xiàn)象更加明顯;增加保溫溫度和保溫時間,固相球化率增加,可以削弱流動應(yīng)力增加的尺度效應(yīng)。
[Abstract]:ZL101 alloy was remelted at different temperature and holding time to obtain different semi-solid microstructure, and isothermal compression experiments were carried out on the specimens of conventional size (桅 5 mm) and micro size (桅 1 mm). The flow stress curves of samples under different deformation temperature and holding time are obtained. By comparing the mechanical properties of two sizes, the existing conditions and forms of scale effect in the process of miniaturization of semi-solid metals are obtained. The results show that the scale effect of flow stress increases in both room temperature and high solid rate of ZL101 aluminum alloy, and the increase of flow stress in high solid rate is more obvious. With the increase of holding temperature and holding time, the increase of solid spheroidization can weaken the scale effect of the increase of flow stress.
【作者單位】: 上海交通大學材料科學與工程學院塑性成形技術(shù)與裝備研究院;
【基金】:國家自然科學基金資助項目(51635005)
【分類號】:TG306
[Abstract]:ZL101 alloy was remelted at different temperature and holding time to obtain different semi-solid microstructure, and isothermal compression experiments were carried out on the specimens of conventional size (桅 5 mm) and micro size (桅 1 mm). The flow stress curves of samples under different deformation temperature and holding time are obtained. By comparing the mechanical properties of two sizes, the existing conditions and forms of scale effect in the process of miniaturization of semi-solid metals are obtained. The results show that the scale effect of flow stress increases in both room temperature and high solid rate of ZL101 aluminum alloy, and the increase of flow stress in high solid rate is more obvious. With the increase of holding temperature and holding time, the increase of solid spheroidization can weaken the scale effect of the increase of flow stress.
【作者單位】: 上海交通大學材料科學與工程學院塑性成形技術(shù)與裝備研究院;
【基金】:國家自然科學基金資助項目(51635005)
【分類號】:TG306
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