(西安建筑科技大學(xué) 材料科學(xué)與工程學(xué)院，西安 710055)
摘 要: 采用累積復(fù)合軋制技術(shù)對MB2鎂合金進(jìn)行軋制。采用光學(xué)顯微鏡、透射電鏡和電子拉伸機等設(shè)備分析變形前及不同道次后MB2鎂合金的微觀組織和力學(xué)性能。結(jié)果表明：MB2鎂合金經(jīng)ARB軋制后，材料平均晶粒尺寸由變形前17.8 µm有效細(xì)化到1.2 µm；材料的抗拉強度和顯微硬度值分別提高到300 MPa和82.1；伸長率在ARB1道次后從24%下降到11.2%，且隨著ARB軋制道次的增加，材料組織的均勻程度提高，抗拉強度和硬度值變化平緩，伸長率回升至22.5%。
關(guān)鍵字: MB2鎂合金；累積復(fù)合軋制；組織細(xì)化；力學(xué)性能
（School of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China）
Abstract:MB2 magnesium alloy was deformed by accumulative roll bonding (ARB) technology. The microstructures and mechanical properties of MB2 magnesium alloy after different pass ARB were observed and analyzed by optical microscopy, TEM and tensile testing machine. The results show that the average grain size is refined from 17.8 µm to 1.2 µm after MB2 magnesium alloy is deformed by ARB process. The tensile strength and microhardness rise to 300 MPa and 82.1, respectively. The elongation rate after ARB1 decreases from 24% to 11.2%. With the increase of ARB rolling pass, the homogeneous of materials is improved, the tensile strength and hardness change relatively smooth, but the elongation rate rise to 22.5%.
Key words: MB2 magnesium alloy; accumulative roll bonding(ARB); microstructure refinement; mechanical properties
