(1. 西南大學(xué) 材料與能源學(xué)部，重慶 400715；
2. 西南大學(xué) 潔凈能源與先進(jìn)材料研究院，重慶 400715；
3. 重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044；
4. 重慶科學(xué)技術(shù)研究院 重慶新材料研究中心，重慶 401123)
摘 要: 闡述了鎂合金應(yīng)變硬化行為的研究現(xiàn)狀；概括了組織參數(shù)對鎂合金應(yīng)變硬化行為的影響；提出此研究領(lǐng)域尚需解決的科學(xué)問題。鎂合金的應(yīng)變硬化行為與激活變形模式的類型和數(shù)量有密切的關(guān)系。此外，織構(gòu)、固溶元素、析出相和晶粒尺寸等組織參數(shù)對滑移和孿生主導(dǎo)變形的應(yīng)變硬化行為都有較大的影響。目前，組織參數(shù)與應(yīng)變硬化行為的關(guān)系還需要更加系統(tǒng)的研究。此外，有必要研究和開發(fā)適用于鎂合金的應(yīng)變硬化理論模型。
關(guān)鍵字: 鎂合金；應(yīng)變硬化行為；位錯滑移；孿生
（1. Faculty of Materials and Energy, Southwest University, Chongqing 400715, China;
2. Institute for Clean Energy & Advanced Materials, Southwest University, Chongqing 400715, China;
3. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
4. Chongqing Center for Advanced Materials, Chongqing Academy of Science and Technology, Chongqing 401123, China）
Abstract:Some aspects of the present research on the strain hardening behavior at room temperature in wrought magnesium alloys were reviewed. The influence of the typical microstructure parameters on the strain hardening behavior of magnesium alloys was also discussed. Finally, a few critical scientific problems in this research field were pointed out. The strain hardening behavior of magnesium alloys exhibited a strong dependence on the type and amount of active deformation modes. Moreover, both the strain hardening behavior dominated by dislocation slip and twinning can be greatly influenced by texture, solid solution element, precipitate and grain size. Currently, the relationship between the microstructure and strain hardening behavior has not been symmetrically studied. Furthermore, further works are needed to study and develop the strain hardening model suitable for magnesium alloys.
Key words: magnesium alloy; strain hardening behavior; dislocation slip; twinning
