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題名 | Fracture Toughness of Powder Forged Iron-based Alloys=鐵基合金粉末鍛造鋼破裂韌性 |
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作者 | 馮慧平; 廖國基; 鄭春德; Feng, H. P.; Liao, K. C.; Cheng, C. D.; |
期刊 | 明志學報 |
出版日期 | 20060100 |
卷期 | 37:2 民95.01 |
頁次 | 頁37-41 |
分類號 | 472.3 |
語文 | eng |
關鍵詞 | 破裂韌性; 粉末鍛造; 燒結鐵基合金; Fracture toughness; Powder forging; Sintered iron-based alloys; |
中文摘要 | 本研究檢視燒結鐵基合金經鍛造製程後之破裂韌性,實驗結果顯示傳統燒結合金 (密度6.44~6.78g/cm³) 之破裂韌性約13.1~18.2 MPa √m,經鍛造後 (密度7.27~7.37g/cm³) 之破裂韌性顯著提升為 24.4~28.9MPa √m,合金之密度或孔隙率可能是影響破裂韌性的主控因素。實驗亦顯示由密度為 6.44g/cm³之燒結試片進行後續鍛造製程,破裂韌性具有較大之提升,其原因可能在於此試片於鍛造製程中,承受較高程度之變形所致。 |
英文摘要 | Fracture toughness of sintered iron-based alloys under the forging procedure is investigated in the current study. Experiments show that the fracture toughness KIC of conventional sintered iron-based alloys range from 13.1 to 18.2 MPa √m with the associated density of 6.44 to 6.78 g/cm³. Powder forged iron-based alloys nevertheless display significantly larger fracture toughness of 24.4 to 28.9 MPa √m with the increasing density of 7.27 to 7.37 g/cm³. The density or porosity possibly dominates the fracture toughness of the alloy. That the sintered specimen with density of 6.44 g/cm³ under the forging process has a large increase in fracture toughness might be due to high degree of deformation or flow in this subsequent procedure. |
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