蠕变温度对Al-Cu-Mg合金晶内S’相析出过程的影响  

Effects of Creep Temperatures on the Precipitation of S' Phases in Al-Cu-Mg Alloys

作　　者：陈宇强[1] 易丹青[1] 潘素平[1] 黄霞[2] 周明哲[1] 王斌[1] 

机构地区：[1]中南大学,湖南长沙410083 [2]中国铝业股份有限公司郑州研究所,河南郑州450041

出　　处：《稀有金属材料与工程》2011年第1期63-68,共6页Rare Metal Materials and Engineering

摘　　要：为了研究蠕变温度对Al-Cu-Mg合金晶内S’相析出过程的影响,测定125、150、175、200℃4种温度下合金的蠕变性能,并通过透射电子显微镜对比分析蠕变后试样夹头部位和断口附近区域的微观组织变化。结果表明:在150℃,345MPa蠕变96h后,合金断口附近区域晶内S’相的长度和厚度比夹头部位增加了1倍。在175℃,265MPa蠕变100h和在200℃,210MPa蠕变115h后,合金断口附近区域晶内S’相厚度比夹头部位都有明显增加,而长度则略有下降。In order to investigate the effects of creep temperatures on the precipitation of S＇ phases of Al-Cu-Mg alloys, the creep properties were measured at 125, 150, 175 and 200 oC and the difference of microstructure between the grip and the fracture area was observed through transmission electron microscopy （TEM）. The results show that the length and thickness of S＇ phases in the fracture area is twice as many as the grip area in the alloy crept at 150 oC under the stress of 345 MPa for 96 h. Compared with their grip areas, the length of S＇ phases in the fracture areas of the sample crept at 175 oC under the stress of 265 MPa for 100 h and the sample crept at 200 oC under the stress of 210 MPa for 115 h is increased apparently, while the thickness is decreased slightly.

关 键 词：AL-CU-MG合金 蠕变 S’相 

分 类 号：TG146.21[一般工业技术—材料科学与工程]