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題 名 | TMCP製程鋼及銲件之高溫特性=High Temperature Characteristics of TMCP Steel Weldments |
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作 者 | 游清帆; 王星豪; 陳立業; | 書刊名 | 銲接與切割 |
卷 期 | 9:4 1999.07[民88.07] |
頁 次 | 頁60-68 |
分類號 | 472.14 |
關鍵詞 | 高溫拉伸; 動態應變時效; 負應變速率敏感度; 應變硬化指數; 強度係數; High temperature tensile; API 5L X65; Dynamic strain aging; Negative strain rate sensitivity; Strain-hardening exponent; Strength coefficient; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究旨在探討TMCP製程的鋼材及銲件,在不同應變速率及不同溫度下的高溫機 械性質。在應力-應變曲線圖中某一溫度範圍內出現不規則的鋸齒狀曲線,同時有加工硬化 量,負值的應變速率敏感度,以及較大應變硬化指數等現象,主要是由於動態應變時效的作 用( Dynamic Strain Aging )。 動態回復( Dynamic Recovery )及動態再結晶( Dynamic Recrystallization )應會伴隨發生,但較為不明顯。因材料具有的帶狀組織存在 , 是故在 4 械性質有方向性的差異。 本研究顯示動態應變時效發生的溫度介於 100 ℃∼ 300 ℃,尤其在低應變速率下,動態應變時效的作用更加顯著。 |
英文摘要 | The purpose of this investigation was to study the high temperature mechanical properties of the TMCP steel and its weldment under different strain rates and temperatures. Serrated flows in the stress-strain curves were observed between temperature range of 100 ℃ and 300 ℃. The reason was attributed to dynamic strain aging of the specimens as dislocations interacted with mainly interstitial solid solutions. The region of dynamic strain aging corresponded to the occurrence of negative strain rate sensitivity. The loss in ductility, the increment of the flow stress, the larger value of strain-hardening exponent and strength coefficient at a certain temperature and strain rate were characterized by the onset of dynamic strain aging. The anisotropic mechanical properties of steel were caused by the existence of the bend structure. |
本系統中英文摘要資訊取自各篇刊載內容。