Deformation Mechanism in Simple Tension of Cold-Rolled Extra-Low-Carbon Light Gauge Sheet
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摘要: 通過對超低碳IF鋼冷軋薄鋼板拉伸過程中不同變形程度的測試與掃描電鏡的觀察,研究了其表面形貌及組織的變化規律.探討了超低碳鋼韌性斷裂中內部孔洞形成機理,并指出超低碳鋼中的微孔洞不是主要由夾雜物或第二相粒子產生,而是因為位錯的滑移、集聚,在原有損傷處形成.Abstract: By testing the cold-rolled extra-low-carbon light gauge sheet samples under different deformation stages and observing them by SEM, their surface pattern and the rules of the transmutation of microstructure has been researched, and the mechanism of the formation of interior holes in gliding fracture was discussed. The result pointed out that it is dislocations' slipping and gathering in original impaired locations but not inclusion and second-phase pericles that is mainly responsible for formation of micro-holes in extra-low-carbon steel.
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