Fracture analysis of automobile stabilizer bar

doi:10.13251/j.issn.0254-6051.2023.01.044

Abstract

Abstract: A stabilizer bar of automobile broke was failed in a short mileage during the durability test, then the fracture cause was analyzed by physical and chemical inspection, metallographic inspection and fracture analysis of the failed parts with direct reading spectrometer, hardness tester, metallographic microscope and scanning electron microscope, and in combination with the processing process of the stabilizer bar. The results show that the fracture morphology of the failed stabilizer bar is mainly intergranular, there are fatigue striations in the extended region, and the final fracture is dimpled. This is mainly due to the introduction of hydrogen through pickling treatment during the processing of the stabilizer bar, resulting in delayed cracking of the stabilizer bar first, and then fatigue and propagation in the durability test until the final fracture.

Key words: stabilizer bar, intergranular fracture, fatigue, delayed cracking

CLC Number:

TG157

Liu Huadong, Shao Baiming, Li Junwan. Fracture analysis of automobile stabilizer bar[J]. Heat Treatment of Metals, 2023, 48(1): 253-256.

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