Correlation between microstructure evolution and cryogenic fracture toughness in aging ITER-grade 316LN weldments
文献类型：期刊论文
| 作者 | Xin, Jijun1,3; Fang, Chao1 ; Huang, Chuanjun2; Song, Yuntao1; Wei, Jing1; Li, Laifeng2
|
| 刊名 | CRYOGENICS
 |
| 出版日期 | 2018-12-01 |
| 卷号 | 96页码:144-150 |
| 关键词 | 316LN weldment Post-weld heat treatment Microstructure Mechanical properties Fracture toughness |
| ISSN号 | 0011-2275 |
| DOI | 10.1016/j.cryogenics.2018.04.003 |
| 通讯作者 | Fang, Chao(fangchao@ipp.ac.cn) |
| 英文摘要 | In the present work, the correlation between microstructural evolution and fracture toughness in 316LN joints welded by Tungsten Inert Gas (TIG) was investigated. The effect of post-weld heat treatment (PWHT) on the microstructure and toughness was characterized. The welding process can significantly change the equiaxed grains of base metal to cells and dendrites, while the PWHT can increase the dendrite size, mitigate the texutre intensity, reduce the dislocation density, and slightly weaken the ultimate tensile strength of the joints. Fracture toughness tests reveal that the strain-induced martensitic transformation at cryogenic temperatures can remarkably deteriorate the fracture toughness. Due to the microstructural evolution during PWHT, the J-integral values at 77 K and 4.2 K decrese to 85% and 54% of those in the as-welded conditions, respectively. The fracture morphology of the as-welded joint shows a characterization of ductile fracture, while the PWHT joint features a mixture of ductile and brittle fracture. |
| WOS关键词 | CR/NI EQUIVALENT RATIO ; CHI PHASES ; STEEL ; SIGMA ; BEHAVIOR |
| 资助项目 | ITER IO ; CNDA |
| WOS研究方向 | Thermodynamics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000452815400017 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | ITER IO ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; CNDA ; CNDA ; CNDA ; CNDA ; CNDA ; CNDA ; CNDA ; CNDA ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; ITER IO ; CNDA ; CNDA ; CNDA ; CNDA ; CNDA ; CNDA ; CNDA ; CNDA |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/40881]  |
| 专题 | 合肥物质科学研究院_中科院等离子体物理研究所 |
| 通讯作者 | Fang, Chao |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China 2.Chinese Acad Sci, Tech Inst Phys & Chem, State Key Lab Technol Space Cryogen Propellants, Beijing 100190, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xin, Jijun,Fang, Chao,Huang, Chuanjun,et al. Correlation between microstructure evolution and cryogenic fracture toughness in aging ITER-grade 316LN weldments[J]. CRYOGENICS,2018,96:144-150. |
| APA | Xin, Jijun,Fang, Chao,Huang, Chuanjun,Song, Yuntao,Wei, Jing,&Li, Laifeng.(2018).Correlation between microstructure evolution and cryogenic fracture toughness in aging ITER-grade 316LN weldments.CRYOGENICS,96,144-150. |
| MLA | Xin, Jijun,et al."Correlation between microstructure evolution and cryogenic fracture toughness in aging ITER-grade 316LN weldments".CRYOGENICS 96(2018):144-150. |
入库方式： OAI收割
来源：合肥物质科学研究院
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