中國(guó)有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 13 No. 6 December 2003 |
aluminum brazed joints
MA Xin(馬 鑫)3, F. Yoshida3
（1. State Key Laboratory of Advanced Production Technology,
Harbin Institute of Technology, Harbin 150001, China;
2. Center for Robotics and Manufacturing Systems, College of Engineering,
University of Kentucky, Lexington, KY 40506, USA;
3. Department of Mechanical System Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan）
Abstract:The main objective is to provide an evidence of spatial dependence of mechanical responses of a heterogeneous aluminum brazed joint re-solidified clad, and to confirm a sufficient sensitivity of a nano-indentation—load curve method for identifying the dependence. Topological features of a network of solidification microstructures(α phase and eutectic), formed during quench in a brazing process of aluminum alloy, influence significantly dynamic mechanical responses of resulting heterogeneous material. Nano/micro indentation depth vs load characteristics of differing phases suggest a spatially sensitive mechanical response of a re-solidified fillet in the joint zone. Hence, a spatial distribution, pattern formations and other morphological characteristics of microstructures have a direct impact on an ultimate joint integrity. Topology-induced variations of indentation—load curves was presented. A hypothesis involving microstructures spatial distribution vs mechanical response was formulated.
Key words: nano-indentation; solidification microstructure; aluminum brazing; mechanical response
