(重慶大學(xué) 材料科學(xué)與工程學(xué)院， 重慶 400044)
摘 要: 采用加工圖理論系統(tǒng)分析了AZ31B鎂合金在高溫變形過程中的變形行為。 結(jié)果表明： 采用加工圖理論分析材料的高溫變形行為能準(zhǔn)確直觀地反映出材料在不同變形條件下的組織演變規(guī)律。 分析加工圖發(fā)現(xiàn)， AZ31B鎂合金在300℃以上具有很好的塑性， 但是在變形溫度為300~350℃時則需要采用較高的應(yīng)變率， 反之則會出現(xiàn)流變失穩(wěn)現(xiàn)象， 合金的塑性顯著降低。
關(guān)鍵字: AZ31B；加工圖； 流變失穩(wěn)； 高溫塑性變形
HUANG Guang-jie, HUANG Guang-sheng
（ College of Materials Science and Engineering,
Chongqing University, Chongqing 400044, China）
Abstract: Deformation behavior at elevated temperature of AZ31B magnesium alloy was studied systematically by processing map theory. As a result, deformation behavior at elevated temperature analyzed by processing map theory can indicate exactly the evolving law of structures of materials under different deformation condition. By analyzing processing map analyzing, AZ31B magnesium alloy is showed to have excellent plasticity over 300℃, but it would better to adopt higher strain rate at temperature of 300 to 350℃, or the plasticity would decline obviously due to flow instabilities.
Key words: magnesium alloy; processing map; flow instability; hot deformation
