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| 初生α相含量对TC18时效组织及力学性能的影响 |
| Effect of Volume Fraction of Primary α Phase on Mechanical Property in TC18 Alloy |
| Received:February 17, 2021 |
| DOI：10.3969/j.issn.1674-6457.2021.03.018 |
| 中文关键词: 初生α相 热处理 力学性能 元素再分配 |
| 英文关键词: primary α phase solution temperature mechanical property element partitioning |
| 基金项目:国家自然科学基金(51690161);东北大学“大学生创新训练计划”(200265) |
| Author Name | Affiliation | | XIN Hong-jing | Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China | | LIAO Min-qian | Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China | | WANG Xiao-han | Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China | | CHEN Zhi-hong | Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China | | CHEN Zhong-cheng | Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China | | WANG Ping | Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China |
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| 中文摘要: |
| 目的 探究TC18合金中初生α相含量对时效后次生α片层形貌及力学性能的影响。方法 通过改变两相区固溶温度控制初生α相含量，观察固溶后合金元素分布及相同时效后合金的组织形貌，研究固溶温度对合金拉伸性能的影响。结果 固溶过程中发生元素再分配，固溶温度低，初生α相含量高，β基体中β稳定元素含量高，β基体稳定性强，抑制时效过程中次生α片层析出，时效强化效果弱。固溶温度高，β基体稳定性弱，促进时效过程中次生α片层析出，时效强化效果显著。结论 固溶温度升高，初生α相比例降低，即β基体稳定性降低，促使时效过程中大量次生α相析出，显著提高合金强度。 |
| 英文摘要: |
| The effect of volume fraction of primary α phase on alloy element partitioning, the morphology of secondary α lamellae and the tensile property in TC18 alloy were studied. The volume fraction of primary α phase and the morphology of secondary α lamellae were characterized and the tensile properties were tested at different solution temperatures. The results showed that element partitioning at low solution temperature led to the inhibition of α lamellar precipitation. On the contrary, the volume fraction of primary α phase decreased, and the content of β stabilizing elements in β matrix decreased with the increase of solution temperature. This resulted in a large number of secondary α phase precipitated during the aging process to enhanced the strength of the alloy. |
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