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2009年02月28日

【期刊论文】Finite element analysis of residual stress in the welded zone of a high strength steel

李亚江， LI YAJIANG*， WANG JUAN， CHEN MAOAI and SHEN XIAOQIN

Bull. Mater Sci., Vol. 27 No.2, April 2004, 101-106，-0001，（）：

-1年11月30日

The distribution of the residual stress in the weld joint of HQ130 grade high strength steel was investigated by means of finite element method (FEM) using ANSYS software. Welding was carried out using gas shielded arc welding with a heat input of 16 kJ/cm. The FEM analysis on the weld joint reveals that there is a stress gradient around the fusion zone of weld joint. The instantaneous residual stress on the weld surface goes up to 800～1000MPa and it is 500～600 MPa, below the weld. The stress gradient near the fusion zone is higher than any other location in the surrounding area. This is attributed as one of the significant reasons for the development of cold cracks at the fusion zone in the high strength steel. In order to avoid such welding cracks, the thermal stress in the weld joint has to be minimized by controlling the weld heat input.

High strength steel， gas shielded arc welding， residual stress， weld cracks.，

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2009年02月28日

【期刊论文】Fine structures in Fe3Al alloy layer of a new hot dip aluminized steel

李亚江， LI YAJIANG*， X HOLLY† and ZHANG YONGLAN

Bull. Mater. Sci. Vol. 25, No.7, December 2002, 101-105，-0001，（）：

-1年11月30日

摘要

The fine structure in the Fe-Al alloy layer of a new hot dip aluminized steel (HDA) was examined by means of X-ray diffractometry (XRD), electron diffraction technique, etc. The test results indicated that the Fe-Al alloy layer of the new aluminized steel mainly composed of Fe3Al, FeAl and a-Fe (Al) solid solution. There was no brittle phase containing higher aluminum content, such as FeAl3 (59

Surface alloying， iron aluminides， electron diffraction， X-ray diffraction (， XRD)， .，

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2009年02月28日

【期刊论文】Fine structure in the inter-critical heat-affected zone of HQ130 super-high strength steel

李亚江， LI YAJIANG*†， WANG JUAN† and LIU PENG† *National Key Laboratory of Advanced Welding Production Technology， Harbin Institute of Technology， Harbin ， P.R.China †Key Laboratory of Liquid Structure and Heredity of Materials， Ministry of Education， Shandong University， Jinan ， P.R.China

Bull. Mater. Sci., Vol. 26, No.5, February 2003, 101-106，-0001，（）：

-1年11月30日

摘要

High strength steel; heat-affected zone; M-A constituent; fine structure.

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2009年02月28日

【期刊论文】Fe3Al/18-8异种材料真空扩散焊工艺研究

李亚江，，王娟

材料科学与工艺，2004，2（1）45～48，-0001，（）：

-1年11月30日

摘要

研究了Fe3Al/18-8异种材料扩散焊中工艺参数对界面结合、接头变形状况和剪切强度的影响。采用金相显微镜和扫描电镜（SEM）分析了不同焊接工艺条件下Fe3Al/18-8异种材料扩散焊接头的显微组织特征。结果表明合适的扩散焊工艺参数为：加热温度1020～1040℃，保温时间45～60min，焊接压力12～15MPa.

Fe3Al金属间化合物， Fe3Al/， 18-8扩散焊接头，工艺参数，剪切强度

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2005年07月22日

【期刊论文】Effect of Cr and Ni on diffusion bonding of Fe3Al with steel

李亚江， WANG JUAN † LI YAJIANG *， † and MA HAIJUN

Bull. Mater. Sci., Vol. 28, No.1, February 2005, pp. 000-000.，-0001，（）：

-1年11月30日

摘要

Microstructure at the diffusion bonding interface between Fe3Al and steel including Q235 low carbon steel and Cr18-Ni8 stainless steel was analysed and compared by means of scanning electron microscopy and transmission electron microscopy. The effect of Cr and Ni on microstructure at the Fe3Al/steel diffusion bonding interface was discussed. The experimental results indicate that it is favourable for the diffusion of Cr and Ni at the interface to accelerate combination of Fe3Al and steel during bonding. Therefore, the width of Fe3Al/Cr18-Ni8 interface transition zone is more than that of Fe3Al/Q235. And Fe3Al dislocation couples with different distances, even dislocation net occur at the Fe3Al/Cr18-Ni8 interface because of the dispersive distribution of Cr and Ni in Fe3Al phase.

Cr， Ni， Fe3Al/， steel interface， diffusion bonding.，

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