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固溶處理后預(yù)變形對 Ti-6Al-4V Alloy時效行為和機(jī)械性能的影響
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西南石油大學(xué)材料科學(xué)與工程學(xué)院

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福建省材料基因重點實驗室開放課題（廈門大學(xué)），廣西省信息材料重點實驗室開放基金（桂林電子科技大學(xué)），四川省高等學(xué)校油氣田材料重點實驗室開放基金（西南石油大學(xué)，X151518KCL23）


Effect of Pre-deformation on the Aging Behavior and Mechanical Properties of Ti-6Al-4V Alloy
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1.School of Materials Science and Engineering,Southwest Petroleum University;2.Sichuan,China;3.College of Materials and Fujian Provincial Key Laboratory of Materials Genome,Xiamen University;4.Fujian,China;5.Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology;6.Guangxi,China

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This work was supported by the open fund of Fujian Provincial Key Laboratory of Materials Genome (Xiamen University), and Guangxi Key Laboratory of Information Materials (Guilin University of Electronic Technology), P.R. China, and Scientific Research Foundation and Opening Foundation (X151518KCL23) of Southwest Petroleum University.

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    摘要:

    本文研究了固溶處理后預(yù)變形對Ti-6Al-4V合金時效行為和機(jī)械性能的影響。結(jié)果顯示在940 °C 和 955 °C固溶處理后進(jìn)行預(yù)變形，可以提高時效過程中第二相α的析出。在940 °C固溶處理后，隨著預(yù)變形量的增加，時效處理后第二相α含量增加，α相尺寸減小，合金的強(qiáng)度和硬度增加。在時效處理之前進(jìn)行預(yù)變形可以明顯提高合金的拉伸強(qiáng)度和硬度，也能同時保持比較好的韌性。相對固溶溫度為940 °C來說， Ti-6Al-4V合金在955 °C固溶處理后進(jìn)行預(yù)變形，對于提高合金的強(qiáng)度和硬度的效果不顯著。本文采用掃描電鏡對不同預(yù)變形和時效處理后的合金斷口形貌進(jìn)行了分析。

    Abstract:

    The effects of pre-deformation on the aging behavior and mechanical properties of Ti-6Al-4V alloy were studied. Results show that the addition of pre-deformation after the solution process at 940 °C and 955 °C is beneficial in promoting the precipitation of the secondary α phase during the aging of Ti-6Al-4V alloy. When solution temperature was 940 °C, the content of the secondary α phase increased with an increase in pre-deformation amount, its size decreased, and the strength and hardness of the alloy increased monotonously after aging. The tensile strength and hardness of Ti-6Al-4V alloy after aging were evidently higher with pre-deformation than without pre-deformation. Simultaneously, excellent plasticity was maintained. In the case with added pre-deformation, a solution temperature of 955 °C slightly improved the strength and hardness of Ti-6Al-4V alloy compared with a solution temperature of 940 °C. Scanning electron microscopy examinations indicate that the fracture modes of all aged alloys with varying pre-deformation degrees are ductile fracture.

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引用本文

王書亮,付朝政,陳雨婷,劉麗,付春艷,黃藝雄,向定漢,蔣小松.固溶處理后預(yù)變形對 Ti-6Al-4V Alloy時效行為和機(jī)械性能的影響[J].稀有金屬材料與工程,2020,49(7):2198~2206.[Wang Shuliang, Fu Chaozheng, Chen Yuting, Liu Li, Fu Chunyan, Huang Yixiong, Xiang Dinghan, Jiang Xiaosong. Effect of Pre-deformation on the Aging Behavior and Mechanical Properties of Ti-6Al-4V Alloy[J]. Rare Metal Materials and Engineering,2020,49(7):2198~2206.]
DOI：10.12442/j. issn.1002-185X. E20190045

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  • 收稿日期:2019-03-30
  • 最后修改日期:2019-07-01
  • 錄用日期:2019-07-24
  • 在線發(fā)布日期: 2020-08-31
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