{"corpus_id":139878704,"paper_sha":"18f51e1d694bedd2a62a06c593474bcb33ede53d","doi":"10.22226/2410-3535-2018-4-567-571","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":2906114417,"dblp_id":null,"acl_id":null,"title":"Superplastic behavior of the fine-grained Ti-21Al-18Nb-1Mo-2V-0.3Si intermetallic alloy","year":2018,"publication_date":"2018-12-01","venue":"","journal":{"name":"Letters on Materials","pages":"567-571","volume":"8"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Materials Science","Engineering"],"reference_count":2,"citation_count":6,"influential_citation_count":0,"is_open_access":true,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":"https://lettersonmaterials.com/Upload/Journals/11050/567-571.pdf","s2_open_access_landing_url":"https://www.semanticscholar.org/paper/18f51e1d694bedd2a62a06c593474bcb33ede53d","s2_open_access_license":"CCBY","s2_open_access_status":"HYBRID","pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"Superplastic behavior of the novel Ti-21Al-18Nb-1Mo-2V-0.3Si intermetallic alloy with rather low density ρ ≈ 5.067 g / cm 3 was studied. The homogeneous fine-grained microstructure in the alloy, which contained three ordered phases: O (Ti 2 AlNb), B2 (Ti-Al-Nb) and α 2 (Ti 3 Al), was produced by thermomechanical processing. It included the hot isostatic pressing at 1080°C ( P = 140 MPa for 6 h), two-step quasi-isothermal forging at 870 – 1060°C, and pack rolling at 930 – 950°C. The fine-grained alloy exhibited high superplastic elongations δ > 230 % in the temperature range of 875 – 1000°C and at an initial strain rate of 4 × 10 −4 s −1 . The maximum elongation δ = 958 % was obtained at 960°C. Microstructure analysis revealed that maximum superplastic elongation was obtained when material had approximately equal content of the main B2- and α 2 -phases suggesting that the B2 / α 2 phase boundary sliding plays an important role during superplastic deformation. Deviation the Burgers orientation relationships: (110) B2 // (0001) α 2 , [1-1-1] B2 // [1-210] α 2 pointed out to extensive grain rotation during superplastic flow. The deformation induced grain growth testified to grain boundary migration. Besides, the signs of the O→B2→ α 2 phase transformations were also observed after testing at 960°C. The minor content of the O-phase in the Ti 2 AlNb-based intermetallic alloy was present at 960°C in the ( α 2 + O)-lamellar structure. Crystallographic orientations between the α 2 - and the O-phases were found to be (1010) α 2 // (110) O , [0001] α 2 // [001] O .","claims":[{"public_id":"cl_4ebf029f51becb67cd8b2ee58ebd62a7","status":"active","text":"Deformation-induced grain growth and signs of O→B2→α₂ phase transformations are observed after testing at 960°C; the minor O-phase is present in the (α₂+O)-lamellar structure with crystallographic orientations (1010) α₂ // (110) O, [0001] α₂ // [001] O.","confidence":0.85,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_4ebf029f51becb67cd8b2ee58ebd62a7"},{"public_id":"cl_ad759fbec98f62568770d5f806a4e073","status":"active","text":"Deviation from the Burgers orientation relationships (110) B2 // (0001) α₂, [1-1-1] B2 // [1-210] α₂ indicates extensive grain rotation during superplastic flow.","confidence":0.85,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_ad759fbec98f62568770d5f806a4e073"},{"public_id":"cl_96194a7c68ba0bf0e217b87a7541b7b4","status":"active","text":"Maximum superplastic elongation occurs when the material has approximately equal content of the main B2- and α₂-phases, suggesting that B2/α₂ phase boundary sliding plays an important role during superplastic deformation.","confidence":0.9,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_96194a7c68ba0bf0e217b87a7541b7b4"},{"public_id":"cl_7463cd23af860a50c9ce4acc2bba33e6","status":"active","text":"The fine-grained Ti-21Al-18Nb-1Mo-2V-0.3Si intermetallic alloy exhibits high superplastic elongations δ > 230% in the temperature range 875–1000°C at an initial strain rate of 4×10⁻⁴ s⁻¹, with a maximum elongation δ = 958% obtained at 960°C.","confidence":0.95,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_7463cd23af860a50c9ce4acc2bba33e6"}],"concepts":[{"public_id":"co_47aa0c3f1eb20be167aa779c906dd0e1","status":"active","name":"phase boundary sliding","description":"Sliding at the B2/α₂ phase boundaries, proposed as a key mechanism for superplastic deformation when the two phases are present in approximately equal content.","types":["mechanism"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_47aa0c3f1eb20be167aa779c906dd0e1"},{"public_id":"co_4fee1ed6560781591e330b7c44ee2368","status":"active","name":"phase transformation","description":"The O→B2→α₂ transformations observed after testing at 960°C.","types":["process"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_4fee1ed6560781591e330b7c44ee2368"},{"public_id":"co_5672a0dfebf00fc67bea0d54de106246","status":"active","name":"superplastic elongation","description":"The ability of the alloy to undergo large tensile deformation (δ > 230%) in the temperature range 875–1000°C, with a maximum δ = 958% at 960°C.","types":["property","measurement"],"aliases":["elongation"],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_5672a0dfebf00fc67bea0d54de106246"},{"public_id":"co_7d56d7ead21be204d344dd2f0f8fec2a","status":"active","name":"O phase","description":"The Ti₂AlNb ordered phase present in the alloy; 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their deviation indicates grain rotation during superplastic flow.","types":["crystallographic relationship"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_b01c82f79cf59bb564b96bd8fde4e60e"},{"public_id":"co_b03f37c7f53059a85f970bb3f06d1642","status":"active","name":"B2 phase","description":"A Ti-Al-Nb ordered phase present in the alloy; one of the three ordered phases (O, B2, α₂) in the microstructure.","types":["phase"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_b03f37c7f53059a85f970bb3f06d1642"},{"public_id":"co_bd609d424fc59cd6d3718e6c9df154f6","status":"active","name":"grain rotation","description":"Rotation of grains during superplastic deformation, evidenced by deviation from the Burgers orientation relationships.","types":["phenomenon"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_bd609d424fc59cd6d3718e6c9df154f6"},{"public_id":"co_c4ff3a76cb1c6443c7bdad7422416860","status":"active","name":"lamellar structure","description":"The (α₂+O)-lamellar structure in which the minor O-phase is present at 960°C, with crystallographic orientations (1010) α₂ // (110) O, [0001] α₂ // [001] O.","types":["microstructure"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_c4ff3a76cb1c6443c7bdad7422416860"},{"public_id":"co_fab9e0b65bd47b538ebff071d9b31117","status":"active","name":"Ti-21Al-18Nb-1Mo-2V-0.3Si intermetallic alloy","description":"A novel intermetallic alloy with low density ρ ≈ 5.067 g/cm³, containing ordered phases O (Ti₂AlNb), B2 (Ti-Al-Nb), and α₂ (Ti₃Al).","types":["material"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_fab9e0b65bd47b538ebff071d9b31117"}],"external_ids":{"DOI":"10.22226/2410-3535-2018-4-567-571","ArXiv":null,"PubMed":null,"PubMedCentral":null,"MAG":2906114417,"DBLP":null,"ACL":null},"open_access":{"is_open_access":true,"pdf_url":"https://lettersonmaterials.com/Upload/Journals/11050/567-571.pdf","landing_url":"https://www.semanticscholar.org/paper/18f51e1d694bedd2a62a06c593474bcb33ede53d","source":"semantic_scholar","pdf_url_source":"semantic_scholar_open_access_pdf","license":"CCBY","status":"HYBRID","reason":null},"reference_availability":{"status":"available","references_indexed":true,"full_text_available":false,"full_text_source":null,"count_basis":"semantic_scholar_metadata","extraction_status":"not_applicable","reason":null},"source":{"provider":"episteme2","base_corpus":"semantic_scholar_dump","freshness_mode":"unknown","basis":["semantic_scholar_metadata","postgres_metadata"],"limits":["paper metadata is based on indexed upstream scholarly datasets","claims and concepts are available only for extracted papers","absence of claims or concepts means no extracted graph data is available in this response"],"status":"available","degraded":false,"degraded_reasons":[],"diagnostics":{"status":"available","degraded":false,"degraded_reasons":[],"metadata_status":"available","graph_status":"available","abstract_status":"available"},"source_flags":1},"paper_id":637887,"paper_uid":"1743b168-aba5-4a54-8a80-0f4bf9ba82de","canonical_identity":{"paper_id":637887,"paper_uid":"1743b168-aba5-4a54-8a80-0f4bf9ba82de","identity_status":"available","lookup_basis":"semantic_scholar_external_id","compatibility_path":"corpus_id"},"url":"https://sah.borca.ai/papers/139878704"}