研究不同热处理条件下FGH96粉末高温合金在650 ℃空气中疲劳/蠕变交互作用下的裂纹扩展速率,分析不同热处理对FGH96粉末高温合金裂纹扩展速率的影响规律.结果表明:提高固溶温度和盐浴温度可降低合金的裂纹扩展速率,固溶温度对裂纹扩展速率的作用程度大于盐浴温度的作用程度.降低时效温度和缩短时效时间也可延缓合金的裂纹扩展速率,时效温度对裂纹扩展速率的影响大于时效时间.另外,增加保载时间可以加快合金的裂纹扩展速率,但保载时间的影响随着时效温度的升高而减小.
Crack propagation rates of FGH96 P/M superalloys with different heat treatments were tested and compared under fatigue/creep interaction at 650 ℃ in air. Influence of heat treatments on the crack propagation rates of FGH96 P/M superalloys was investigated. The results indicate that the crack propagation rates were decreased when increasing the solid solution temperature or salt bath temperature; the effect of solid solution temperature was greater than that of salt bath temperature. Lower aging temperature and shorter aging time also delayed the crack propagation rates; the effect of the aging temperature was greater than that of the aging time. In addition, the crack propagation rates were increased with the dwelling time prolonging, and its effect decreased with the aging temperature increasing.
参考文献
| [1] | Telesman J;Kantzos P;Gayda J.Superalloys 2004[M].Champion:The TMS High Temperature Alloys Committee,2004:215. |
| [2] | John Schirra J;Paul Reynolds L.Superalloys 2004[M].Champion:The TMS High Temperature Alloys Committee,2004:341. |
| [3] | 张莹,张义文,陶宇.俄罗斯EP741NP粉末高温合金的研究[J].钢铁研究学报,2006(08):58-62. |
| [4] | 李晓,董建新,张丽娜,张麦仓,胡尧和,谢锡善,国为民.疲劳保载时间与固溶处理对PM René 95合金高温裂纹扩展速率的影响[J].金属学报,2001(10):1059-1063. |
| [5] | 国为民,董建新,吴剑涛,张凤戈,陈淦生,陈生大.FGH96镍基粉末高温合金的组织和性能[J].钢铁研究学报,2005(01):59-63. |
| [6] | Jian Mao;Keh-Minn Chang;Wanhong Yang et al.[J].Materials Science and Engineering,2002,A332:318. |
| [7] | Bhowal P R;Wright E F;Raymond E L.[J].METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,1990(21):1709. |
| [8] | Bussac A D E.[J].Fatigue Fracture Engineering Mater Structure,1993(16):861. |
| [9] | Aghaie-Khafri M;Hajjavady M .[J].Materials Science and Engineering A,2008,487:388. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%