Crack propagation and strain-induced α’-martensite transformation in selective laser melting 316L stainless steels
At present, in-situ monitoring of metal cracking and propagation is still a challenge. In this work, we used in-situ tensile tests with precast cracks of selective laser melting (SLM) and conventionally manufactured (CM) 316L stainless steels (SSs) to study crack propagation and strain-induced α′-ma...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-09-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2023.1264709/full |
| _version_ | 1827813626809942016 |
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| author | Zhiheng Tan Maolei Gui Zhiping Zhou Jinlong Lv Shuye Zhang Zhuqing Wang |
| author_facet | Zhiheng Tan Maolei Gui Zhiping Zhou Jinlong Lv Shuye Zhang Zhuqing Wang |
| author_sort | Zhiheng Tan |
| collection | DOAJ |
| description | At present, in-situ monitoring of metal cracking and propagation is still a challenge. In this work, we used in-situ tensile tests with precast cracks of selective laser melting (SLM) and conventionally manufactured (CM) 316L stainless steels (SSs) to study crack propagation and strain-induced α′-martensite transformation. During in-situ tensile, cracks initiate at the concentration of slip lines at the precast crack, and the strong stress at the crack tip will tear apart the grain boundaries causing the crack to propagate until the samples are completely fractured. After in-situ tensile, abnormal grain growth was observed in the plastic zone at the crack tip of the SLMed 316L SS sample, while austenite to α′-martensite transformation was appeared at the grain boundaries of the SLMed 316L SS sample, and martensitic patches generated by severe plastic deformation induced in the CM 316L SS were also observed. The SLMed 316L SS shows higher strength and resistance to deformation than CM 316L SS. In addition, the stress concentration at the crack tip in crack propagation has a significant effect on the transformation of strain-induced α′-martensite. |
| first_indexed | 2024-03-11T23:34:42Z |
| format | Article |
| id | doaj.art-4f3ee6c191df452ca0a7297cdf279eb3 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-03-11T23:34:42Z |
| publishDate | 2023-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-4f3ee6c191df452ca0a7297cdf279eb32023-09-20T04:49:00ZengFrontiers Media S.A.Frontiers in Materials2296-80162023-09-011010.3389/fmats.2023.12647091264709Crack propagation and strain-induced α’-martensite transformation in selective laser melting 316L stainless steelsZhiheng Tan0Maolei Gui1Zhiping Zhou2Jinlong Lv3Shuye Zhang4Zhuqing Wang5Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, ChinaSino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, ChinaSino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, ChinaSino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, ChinaSchool of Mechanical Engineering, Sichuan University, Chengdu, ChinaAt present, in-situ monitoring of metal cracking and propagation is still a challenge. In this work, we used in-situ tensile tests with precast cracks of selective laser melting (SLM) and conventionally manufactured (CM) 316L stainless steels (SSs) to study crack propagation and strain-induced α′-martensite transformation. During in-situ tensile, cracks initiate at the concentration of slip lines at the precast crack, and the strong stress at the crack tip will tear apart the grain boundaries causing the crack to propagate until the samples are completely fractured. After in-situ tensile, abnormal grain growth was observed in the plastic zone at the crack tip of the SLMed 316L SS sample, while austenite to α′-martensite transformation was appeared at the grain boundaries of the SLMed 316L SS sample, and martensitic patches generated by severe plastic deformation induced in the CM 316L SS were also observed. The SLMed 316L SS shows higher strength and resistance to deformation than CM 316L SS. In addition, the stress concentration at the crack tip in crack propagation has a significant effect on the transformation of strain-induced α′-martensite.https://www.frontiersin.org/articles/10.3389/fmats.2023.1264709/fullin-situ tensilecrack propagation316L stainless steelselective laser meltingmartensite |
| spellingShingle | Zhiheng Tan Maolei Gui Zhiping Zhou Jinlong Lv Shuye Zhang Zhuqing Wang Crack propagation and strain-induced α’-martensite transformation in selective laser melting 316L stainless steels Frontiers in Materials in-situ tensile crack propagation 316L stainless steel selective laser melting martensite |
| title | Crack propagation and strain-induced α’-martensite transformation in selective laser melting 316L stainless steels |
| title_full | Crack propagation and strain-induced α’-martensite transformation in selective laser melting 316L stainless steels |
| title_fullStr | Crack propagation and strain-induced α’-martensite transformation in selective laser melting 316L stainless steels |
| title_full_unstemmed | Crack propagation and strain-induced α’-martensite transformation in selective laser melting 316L stainless steels |
| title_short | Crack propagation and strain-induced α’-martensite transformation in selective laser melting 316L stainless steels |
| title_sort | crack propagation and strain induced α martensite transformation in selective laser melting 316l stainless steels |
| topic | in-situ tensile crack propagation 316L stainless steel selective laser melting martensite |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2023.1264709/full |
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