查詢結果分析
相關文獻
- The Influence of Temporary Alloying of Hydrogen on the Microstructure and Superplasticity of Ti-6Al-4V Alloy
- 不同軋延製程對ZK60鎂合金超塑性之研究
- 晶粒大小及顯微組織對ZK60鎂合金低溫超塑性之研究
- AZ80鎂合金擠製板材之超塑性吹氣成型
- 鈦合金流體床滲碳表面碳化物結構與成份分析
- Mn-Cu-Ni合金球墨鑄鐵的沃斯回火特性
- 粉末高速鋼之鍛造變數與顯微結構研究
- Comparison of Transmissible Venereal Tumor Cells with Histiocytoma and Lymphoma Cells
- 鐵-10鋁-30錳-1.0碳的合金鑄件之切削性
- 高溫型Nd-Fe-B燒結磁石之磁性與顯微結構研究
頁籤選單縮合
題 名 | The Influence of Temporary Alloying of Hydrogen on the Microstructure and Superplasticity of Ti-6Al-4V Alloy=暫時充氫對Ti-6Al-4V合金顯微結構及超塑性的影響 |
---|---|
作 者 | 方敦盈; 王文雄; | 書刊名 | Proceedings of the National Science Council : Part A, Physical Science and Engineering |
卷 期 | 22:1 1998.01[民87.01] |
頁 次 | 頁116-125 |
分類號 | 440.39 |
關鍵詞 | Ti-6Al-4V合金; 顯微結構; 超塑性; Superplastic forming; Temporary alloying of hydrogen; |
語 文 | 英文(English) |
中文摘要 | 雙相、細而等軸的晶粒、高溫及低應變速率是超塑性的基本要求,因此,由高溫 變形時晶粒成長所導致之成形後機械性質退化常無法避免;本實驗即針對此一缺點利用暫時 充氫的方式以降低 Ti-6Al-4V 合金之成形溫度,進而改善其在低溫之超塑性成形特性。 此 外,對於暫時充氫所造成之顯微組織變化亦加以探討。 實驗結果顯示,( 1 )低溫( 600 ℃)充氫時顯微組織變化及α、β兩相體積分率的調整,隨著含氫量的增加,持續而緩慢地 變化並漸趨向平衡; ( 2 )高溫( 700、800 ℃)充氫時存在一突然的顯微組織轉變,且 α、β兩相體積分率的重新調整乃是透過一快速的再平衡機構在短時間內完成。對暫時充氫 超塑性成形而言,經由適當地控制充氫量及充氫溫度可大幅提高成形高度, 如 800 ℃時含 有 0.25 wt% H 的試片在相同成形溫度及壓力下成形高度增加了 34%。 |
英文摘要 | A fine, equiaxed duplex microstructure, high temperature and low strain rate are essential requirements for superplastic forming (SPF). However, considerable property degeneration is unavoidable when grain growth occurs during high temperature forming. In this study, temporary alloying of the hydrogen treatment was conducted to reduce the forming temperature and, thus, improve the superplastic property at lower temperatures; in addition, the influence of hydrogen on the microstructure was also investigated. The results indicate that two different procedures using hydrogen can be employed to modify microstructure changes: (1) consecutive slow changes in the microstructure and gradual modification in the alpha-beta volume fraction at low temperatures, and (2) at higher hydrogenation temperatures, an abrupt change in the microstructure and a new alpha-beta volume fraction achieved by using a fast re-equilibrium process. For superplastic forming, considerable improvement in the forming height is obtained through a small addition of hydrogen into the as-received material at the same forming temperature using a proper hydrogenation temperature/hydrogen concentration combination. |
本系統中英文摘要資訊取自各篇刊載內容。