Research on Cracking Sensitivity of Weathering Steel SMA490BW

DOI

10.2991/mce-14.2014.86How to use a DOI?

Keywords

SMA490BW;Three-point bending test; Fracture morphology; Fracture toughness Kc; cracking sensitivity

Abstract

SMA490BW is used specifically for the manufacture of welded frame of high-speed EMU bogies. Bogie is one of a very important bearer units and transmission units during driving while bogie frame is one of the most important bearer units and transmission units in bogie, directly related to safety during driving. So it’s necessary to study on the cracking sensitivity of the materials. Fracture toughness is the basic data in researching the cracking sensitivity of materials in fracture mechanics. This article employs three-point bending test method to test the fracture toughness Kc of weathering steel SMA490BW in plane stress state. Observe the microstructure of SMA490BW by Metallurgical microscope and scan the fracture morphology of the three-point bending specimens by SEM. The results show that for 12mm thick metal, the fracture toughness Kc of SMA490BW is KC=2504.66MPa·mm1/2.The microstructure is small ferrite and strip pearlite. In addition, the fracture of the three-point bending specimen is flat, and the brittle fracture zone is of uniform micro granular. It is a pure plane strain brittle fracture.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiangyang Wu
AU  - Zhiyi Zhang
AU  - Wen Li
AU  - Yongjing Wang
AU  - Yue Liu
PY  - 2014/03
DA  - 2014/03
TI  - Research on Cracking Sensitivity of Weathering Steel SMA490BW
BT  - Proceedings of the 2014 International Conference on Mechatronics, Control and Electronic Engineering
PB  - Atlantis Press
SP  - 388
EP  - 391
SN  - 1951-6851
UR  - https://doi.org/10.2991/mce-14.2014.86
DO  - 10.2991/mce-14.2014.86
ID  - Wu2014/03
ER  -