(1. 上海大學(xué) 材料科學(xué)與工程學(xué)院，上海 200444；
2. 上海大學(xué) 省部共建高品質(zhì)特殊鋼冶金與制備國(guó)家重點(diǎn)實(shí)驗(yàn)室，上海 200444；
3. 上海大學(xué) 材料基因組工程研究院，上海 200444)
摘 要: 鎂合金是實(shí)現(xiàn)航空航天、交通運(yùn)輸、民用建筑等輕量化、緩解日益嚴(yán)重的能源問(wèn)題的重要材料之一。本文以稀土鎂合金為對(duì)象，聚焦多元體系中關(guān)鍵相對(duì)合金性能的作用機(jī)制，從熱力學(xué)上分析稀土鎂合金中的金屬間化合物種類及其物相穩(wěn)定性，進(jìn)一步總結(jié)相變動(dòng)力學(xué)模型及其在稀土鎂合金相轉(zhuǎn)變機(jī)理分析中的應(yīng)用。討論相結(jié)構(gòu)和界面對(duì)稀土鎂合金力學(xué)性能、耐蝕性能和儲(chǔ)氫性能的影響規(guī)律，展望通過(guò)調(diào)控關(guān)鍵相和第二相轉(zhuǎn)變?cè)O(shè)計(jì)新型稀土鎂合金的前景和發(fā)展方向。
關(guān)鍵字: 稀土鎂合金；金屬間化合物；相界面；熱力學(xué)；動(dòng)力學(xué)
（1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
2. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200444, China;
3. Materials Genome Institute, Shanghai University, Shanghai University, Shanghai 200444, China）
Abstract:Magnesium alloys are one of the important materials to realize the lightweight of aerospace, transportation, civil construction, etc, and to alleviate the increasingly serious energy problems. In this paper, the rare earth-magnesium (RE-Mg) alloys were taken as the object. Focusing on the effect of key phases on the properties in multicomponent alloys, the intermetallic compounds and their stability in the RE-Mg system were thermodynamically analyzed, and then the recent phase transformation kinetic models as well as their applications in phase transformation mechanism analysis of RE-Mg alloys were reviewed. It discusses the effects of phase crystal structure and interface on the mechanical properties, corrosion resistance and hydrogen storage properties, and looks forward to the prospect and development directions of new type RE-Mg alloys designed by controlling the phase transformation of key phases and second phases.
Key words: rare earth-magnesium alloys; intermetallic compounds; phase interfaces; thermodynamics; kinetics
