Developing a strategy for the processing of age-hardenable alloys by ECAP at room temperature

作者：Chinh Nguyen Q^*; Gubicza Jenoe; Czeppe Tomasz; Lendvai Janos; Xu Cheng; Valiev Ruslan Z; Langdon Jerence G

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2009, 516(1-2): 248-252.

DOI：10.1016/j.msea.2009.03.049

• Aging
• Al-Zn-Mg alloys
• Equal-channel angular pressing (ECAP)
• Precipitation
• Supersaturated alloys

It is well known that age-hardenable alloys are generally difficult to process by equal-channel angular pressing (ECAP) at room temperature because they invariably fail by catastrophic cracking or segmentation. Experiments were conducted on two supersaturated Al-Zn-Mg alloys with the objective of developing a strategy for the processing of age-hardenable alloys at room temperature. The results from these experiments demonstrate that successful pressing may be undertaken by conducting the pressing operation very quickly (typically within < 10 min) following a water quench from the solution heat-treatment temperature. It is also shown that there is a significant increase in strength in the alloys even when the ECAP is performed through only a single pass. This latter result has important implications for industrial processing.

• 出版日期2009-8-15