Impact tensile properties of YAG laser welded butt joints made by different steel sheets for vehicles

被引：0

作者：

Takahashi, Y. ^{[1
]}

Daimaruya, M. ^{[1
]}

Kobayashi, H. ^{[2
]}

Tsuda, H. ^{[3
]}

Fujiki, H. ^{[1
]}

机构：

[1] Muroran Inst Technol, Dept Mech Syst Engn, Muroran, Hokkaido 0508585, Japan

[2] Osaka Univ, Dept Mech Sci & Bioengineering, Toyonaka, Osaka 5608531, Japan

[3] Suzuki Motor Co Ltd, Hamamatsu, Shizuoka 4328611, Japan

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2008年 / 22卷 / 9-11期

关键词：

impact tensile strength; split Hopkinson tension bar; YAG laser welded joint; high strength steel; vehicle;

D O I：

10.1142/S0217979208047304

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The tensile properties of YAG laser welded butt joints using different high strength steel sheets with a tensile strength of 270 MPa, 590 MPa and 980 MPa ( denoted HR270, HR590 and HR980, respectively) were investigated at static and dynamic rates, together with the three kinds of laser welded joints made by the same steel sheets. The impact tensile tests were performed by using the vertical type of split Hopkinson tension bar apparatus, while the static tensile tests were carried out using a universal testing machine INSTRON5586. The impact tensile strengths were significantly increased in comparison with the static ones due to the effect of strain rate, which might be the contribution of the part of HR270 base metal. And in both of static and impact tests, the fracture strains of HR270-HR590 joint, HR270-HR980 joint and HR590-HR980 joint were about one half of the fracture strains observed in the same steel welded joints of HR270-HR270, HR270-HR270 and HR590-HR590, respectively.

引用

页码：1712 / 1717

页数：6

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