Failure Characterization of Automotive Structural Steels at Sub-zero Temperatures Under Service Loading
The suspension system of an automobile contributes to its performance and comfort, and its malfunction could lead to an accident. Researchers have extensively studied the durability criteria of these components at room temperature, and a wealth of data is available. The vehicle may be subjected to t...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2025-06-01
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| Series: | Archives of Metallurgy and Materials |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/135510/AMM-2025-2-56-Bhanage.pdf |
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| Summary: | The suspension system of an automobile contributes to its performance and comfort, and its malfunction could lead to an accident. Researchers have extensively studied the durability criteria of these components at room temperature, and a wealth of data is available. The vehicle may be subjected to temperature extremes ranging from 45°C or higher in the desert to –40°C or lower in the Arctic. Subzero temperatures have a significant impact on automobile components and are a serious concern for the automotive industry. The steel alloys used in the manufacturing of automobile components experience ductile to brittle transition (DBT) under such temperature conditions during service loading. The quasi-static and cyclic testing was carried out on stabilizer bars and leaf spring specimens at subzero temperatures to understand the behaviour of automotive materials. The quasi-static strength of the stabilizer bars and leaf springs has been augmented by 21.62% and 55.18%, respectively, at a subzero temperature of –40°C in comparison to room temperature. The fatigue life of leaf springs was improved by 29, 27, and 30% in the number of cycles at higher, medium, and low fatigue loading, respectively. Stabilizer bars were regarded as infinite at all fatigue loadings in subzero temperatures of –40°C. This study investigates the failure characteristics of steels used in automobile stabilizer bars and leaf springs at sub-zero temperatures under quasi-static and cyclic loading conditions. The quasi-static and cyclic fractographic characterizations correlate the mechanical behaviour with the fracture features and mechanisms. This research is critical for the design and development of automotive components under sub-zero temperature conditions in a durable manner. |
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| ISSN: | 2300-1909 |