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Hot Ductility and Fracture Behavior of High-Ti Weathering Steel
Steel Research International ( IF 1.9 ) Pub Date : 2021-02-23 , DOI: 10.1002/srin.202000643 Li-Ying Song 1 , Xiu-Hua Gao 1 , Qi-He Xue 2 , Chao Sun 3 , Ming-Ming Wang 1 , R. Devesh Kumar Misra 4 , Xiao-Lei Zhang 2 , Hong-Yan Wu 1 , Lin-Xiu Du 1
Steel Research International ( IF 1.9 ) Pub Date : 2021-02-23 , DOI: 10.1002/srin.202000643 Li-Ying Song 1 , Xiu-Hua Gao 1 , Qi-He Xue 2 , Chao Sun 3 , Ming-Ming Wang 1 , R. Devesh Kumar Misra 4 , Xiao-Lei Zhang 2 , Hong-Yan Wu 1 , Lin-Xiu Du 1
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The hot ductility behavior of high-Ti weathering steel is studied by high-temperature tensile testing in the temperature range of 650–1100 ºC. The results reveal a ductility trough in high-Ti steel in the range of 650–962, 650–925, and 700–880 °C with minimum reduction in area (RA) of 22.21%, 36.53%, and 43.25% at 800 ºC and different strain rates of 1.0 × 10−3, 5.0 × 10−3, and 1.0 × 10−2 s−1, respectively. A number of secondary cracks containing S, N, and Ti propagate along the grain boundary, and the obvious preferred orientation is found in the microstructure near the fracture at 800 °C. With the increase in strain rate, the value of RA is increased in the temperature range of 650–1050 ºC, such that the probability of crack occurrence is decreased. RA does not increase with the increase in strain rate at 1100 °C and strain rate of 1.0 × 10−2 s−1. The underlying reason is that there is not adequate time for the material to recover or recrystallize with the increase in strain rate, resulting in material softening effect that is not completely reflected.
中文翻译：
高钛耐候钢的热塑性和断裂行为
通过在 650-1100 ºC 温度范围内的高温拉伸试验研究了高钛耐候钢的热延展性行为。结果表明，在 650–962、650–925 和 700–880 °C 范围内，高钛钢的延展性槽在 800 ºC 下的最小面积减少率 (RA) 分别为 22.21%、36.53% 和 43.25%以及1.0 × 10 -3、5.0 × 10 -3和1.0 × 10 -2 s -1 的不同应变率， 分别。大量含有S、N、Ti的二次裂纹沿晶界扩展，在800℃断裂附近的显微组织中发现明显的择优取向。随着应变速率的增加，RA 值在 650-1050 ºC 的温度范围内增加，从而降低裂纹发生的概率。RA 不随着应变速率在 1100 °C 和应变速率为 1.0 × 10 -2 s -1 时增加而增加。其根本原因是材料没有足够的时间随着应变速率的增加而恢复或再结晶，导致材料软化效应没有得到完全体现。
更新日期：2021-02-23
中文翻译：
高钛耐候钢的热塑性和断裂行为
通过在 650-1100 ºC 温度范围内的高温拉伸试验研究了高钛耐候钢的热延展性行为。结果表明，在 650–962、650–925 和 700–880 °C 范围内，高钛钢的延展性槽在 800 ºC 下的最小面积减少率 (RA) 分别为 22.21%、36.53% 和 43.25%以及1.0 × 10 -3、5.0 × 10 -3和1.0 × 10 -2 s -1 的不同应变率， 分别。大量含有S、N、Ti的二次裂纹沿晶界扩展，在800℃断裂附近的显微组织中发现明显的择优取向。随着应变速率的增加，RA 值在 650-1050 ºC 的温度范围内增加，从而降低裂纹发生的概率。RA 不随着应变速率在 1100 °C 和应变速率为 1.0 × 10 -2 s -1 时增加而增加。其根本原因是材料没有足够的时间随着应变速率的增加而恢复或再结晶，导致材料软化效应没有得到完全体现。
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