(1. 重慶大學(xué) 國(guó)家鎂合金材料工程技術(shù)研究中心，重慶 400044；
2. 重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044)
摘 要: 采用顯微組織觀察、拉伸實(shí)驗(yàn)和阻尼測(cè)試等方法研究了一次擠壓、二次擠壓及鍛造這3種不同塑性加工工藝對(duì)ZK60鎂合金的顯微組織、力學(xué)性能及阻尼性能的影響。結(jié)果表明：ZK60變形鎂合金經(jīng)3種塑性加工工藝處理后，不同變形態(tài)間的抗拉強(qiáng)度、屈服強(qiáng)度及伸長(zhǎng)率相差不大，但其阻尼性能卻發(fā)生顯著變化，其中鍛造態(tài)ZK60鎂合金的阻尼性能相對(duì)于擠壓態(tài)的提高2倍多；采用G−L理論分析3種不同變形加工工藝對(duì)ZK60鎂合金阻尼性能的影響規(guī)律。
關(guān)鍵字: 鎂合金；力學(xué)性能；阻尼性能；位錯(cuò)
damping properties of ZK60 magnesium alloys
（1. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China;
2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China）
Abstract: The microstructure, mechanical properties and damping properties of ZK60 magnesium alloy in the first extrusion, second extrusion and forging states were investigated by optical microscopy, tensile test and dynamic mechanical analyzer. The results show that the three different processes technologies have little influences on the ultimate strength, yield strength and elongation of ZK6 magnesium alloy, but the damping properties of the ZK60 magnesium alloys change obviously after the three different processes technologies. The damping properties of ZK60 magnesium alloy in forging state are twice more than those in extrusion state. The influences of processes technology on the damping properties can be explained by G−L theory.
Key words: ZK60 magnesium alloys; mechanical properties; damping capacity; dislocation
