| Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B | |
| Cao, Ruxin1,2; Ye, Xicong3; Liu, Renci1,2; Wang, Xi4; Yang, Chao5; Liu, Dong1,2; Cui, Yuyou1,2; Yang, Rui1,2 | |
| Corresponding Author | Liu, Renci(ryang@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn) |
| 2023-08-01 | |
| Source Publication | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| Volume | 202Pages:11 |
| Abstract | Ti-45Al-2Nb-2Mn-1B (atomic percent, 4522XD) cast step plate with different thicknesses was prepared by in-vestment casting, and the variations of microstructure and creep rupture properties with thickness were examined. With decreasing thickness, lamellar colony size, lamellar thickness, and the size of equiaxed ? grains at the colony boundaries decreased, and the colony boundaries varied from smooth to serrated. Boride particles are mainly long flat needles in the region with 12 mm thickness, curvy flakes with considerable length and width in the region with 8 mm thickness, and curvy ribbons with small length in the region with 4 mm thickness. B27-TiB particles were observed in all the thicknesses, Ti3B4+ TiB2 lamellar particles were observed in the region with 8 mm and 12 mm thicknesses, and B-f-TiB+ TiB2 lamellar particles were observed in the region with 4 mm thickness. The smallest creep rupture elongation is obtained in samples taken from the plate with 12 mm thickness, while the shortest creep rupture life is obtained in samples taken from the region with 8 mm thickness. The former is attributed to the smooth colony boundaries which have weaker resistance to grain rotation, while the latter is attributed to the curvy boride particles that tend to nucleate cracks at the corner with small curve radius, providing a fast track for crack propagation along the boride/matrix interfaces, their considerable size makes the crack reach the critical size for fracture more easily. Weak creep rupture properties of some samples are mainly attributed to the aggregation of colonies whose lamellar interfaces are nearly perpendicular to the loading direction. |
| Keyword | & gamma Investment casting Cooling rate Microstructure Boride Creep rupture property -TiAl alloy |
| Funding Organization | CAS Project for Young Scientists in Basic Research ; National Natural Science Foundation of China ; Major Special Science and Tech-nology Project of Yunnan Province |
| DOI | 10.1016/j.matchar.2023.113056 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | CAS Project for Young Scientists in Basic Research[YSBR-025] ; National Natural Science Foundation of China[51701209] ; National Natural Science Foundation of China[51604161] ; Major Special Science and Tech-nology Project of Yunnan Province[202002AB080001-3] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS ID | WOS:001018941200001 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/178391 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, Renci; Yang, Rui |
| Affiliation | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.China Three Gorges Univ, Coll Mech & Power Engn, Yichang 443002, Peoples R China 4.Zhongye Changtian Int Engn Co LTD, Changsha 410205, Hunan, Peoples R China 5.AECC Commercial Aeroengine Co LTD, Shanghai 200241, Peoples R China |
| Recommended Citation GB/T 7714 | Cao, Ruxin,Ye, Xicong,Liu, Renci,et al. Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B[J]. MATERIALS CHARACTERIZATION,2023,202:11. |
| APA | Cao, Ruxin.,Ye, Xicong.,Liu, Renci.,Wang, Xi.,Yang, Chao.,...&Yang, Rui.(2023).Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B.MATERIALS CHARACTERIZATION,202,11. |
| MLA | Cao, Ruxin,et al."Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B".MATERIALS CHARACTERIZATION 202(2023):11. |
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