(1. 中國兵器工業(yè)第五九研究所，重慶 400039；
2. 哈爾濱工業(yè)大學 材料科學與工程學院，哈爾濱 150001)
摘 要: 在半固態(tài)金屬加工技術(shù)的基礎(chǔ)上，提出偽半固態(tài)觸變成形工藝。對該工藝制備的Al/Al2O3復合材料杯形件進行掃描電鏡觀察、抗彎強度以及斷裂韌性測量。結(jié)果表明：偽半固態(tài)觸變成形的制件具有三維連通的網(wǎng)狀結(jié)構(gòu)，界面結(jié)合緊密，37%Al/Al2O3(體積分數(shù))復合材料杯形件抗彎強度為570~690 MPa，斷裂韌性為8.5~16.8 MPa·m1/2，與其他成形工藝相比，力學性能有所提高；成形溫度及壓力、金屬相體積分數(shù)對力學性能具有較大的影響。
關(guān)鍵字: Al/Al2O3復合材料；偽半固態(tài)觸變成形；力學性能；杯形件
state and toughening-strengthening
（1. No.59 Research Institute of China Ordnance Industry, Chongqing 400039, China;
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China）
Abstract:The thixoforming in pseudo-semi-solid state based on the semi-solid metal forming was proposed. The microstructure of the prepared Al/Al2O3 composite cup shell was observed by SEM, and bend strength and fracture toughness of this alloy were measured. The results show that the cup shell is of three-dimensional network structure and closely bounded interfaces. The bend strength and fracture toughness of 37% Al/Al2O3 (volume fraction) are about 570−690 MPa and 8.5−16.8 MPa·m1/2 respectively. The mechanical properties of the cup shell by this technology are improved compared with other forming technologies. The forming temperature, force and volume fraction of metal phase have great influence on mechanical properties.
Key words: Al/Al2O3 composite; thixoforming in pseudo-semi-solid state; mechanical property; cup shell
