您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 6    December 2003

[PDF Download]    [Flash Online]

    

Topological dependence of mechanical responses of solidification microstructures in 
aluminum brazed joints
GAO Feng(高 峰)1,2, QIAN Yi-yu(钱乙余)1, D. P. Sekulic2,
 MA Xin(马 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

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn