Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behavior
Shape memory property characterizes the behavior of many Ti based and Cu based alloys (SMAs). In Cu-Zn-Al SMAs, the original shape recovering is due to a bcc phase that is stable at high temperature. After an appropriate cooling process, this phase (?-phase or austenitic phase) transforms reversibly...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2015-09-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/1597 |
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| author | Vittorio Di Cocco Francesco Iacoviello Stefano Natali Andrea Brotzu |
| author_facet | Vittorio Di Cocco Francesco Iacoviello Stefano Natali Andrea Brotzu |
| author_sort | Vittorio Di Cocco |
| collection | DOAJ |
| description | Shape memory property characterizes the behavior of many Ti based and Cu based alloys (SMAs).
In Cu-Zn-Al SMAs, the original shape recovering is due to a bcc phase that is stable at high temperature. After
an appropriate cooling process, this phase (?-phase or austenitic phase) transforms reversibly into a B2 structure (transition phase) and, after a further cooling process or a plastic deformation, it transforms into a DO3 phase (martensitic phase). In ?-Cu-Zn-Al SMAs, the martensitic transformation due to plastic deformation is not stable at room temperature: a high temperature “austenitization” process followed by a high speed cooling process allow to obtain a martensitic phase with a higher stability.
In this work, a Cu-Zn-Al SMA in “as cast” conditions has been microstructurally and metallographically
characterized by means of X-Ray diffraction and Light Optical Microscope (LOM) observations. Fatigue crack
propagation resistance and damaging micromechanisms have been investigated corresponding to three different load ratios (R=0.10, 0.50 and 0.75). |
| format | Article |
| id | doaj-art-35bf497cc9ea4845a8bf25968c4c22f6 |
| institution | DOAJ |
| issn | 1971-8993 |
| language | English |
| publishDate | 2015-09-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-35bf497cc9ea4845a8bf25968c4c22f62025-08-20T02:51:46ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932015-09-01934Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behaviorVittorio Di CoccoFrancesco IacovielloStefano NataliAndrea BrotzuShape memory property characterizes the behavior of many Ti based and Cu based alloys (SMAs). In Cu-Zn-Al SMAs, the original shape recovering is due to a bcc phase that is stable at high temperature. After an appropriate cooling process, this phase (?-phase or austenitic phase) transforms reversibly into a B2 structure (transition phase) and, after a further cooling process or a plastic deformation, it transforms into a DO3 phase (martensitic phase). In ?-Cu-Zn-Al SMAs, the martensitic transformation due to plastic deformation is not stable at room temperature: a high temperature “austenitization” process followed by a high speed cooling process allow to obtain a martensitic phase with a higher stability. In this work, a Cu-Zn-Al SMA in “as cast” conditions has been microstructurally and metallographically characterized by means of X-Ray diffraction and Light Optical Microscope (LOM) observations. Fatigue crack propagation resistance and damaging micromechanisms have been investigated corresponding to three different load ratios (R=0.10, 0.50 and 0.75).https://www.fracturae.com/index.php/fis/article/view/1597Zn-Cu-Al alloy |
| spellingShingle | Vittorio Di Cocco Francesco Iacoviello Stefano Natali Andrea Brotzu Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behavior Fracture and Structural Integrity Zn-Cu-Al alloy |
| title | Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behavior |
| title_full | Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behavior |
| title_fullStr | Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behavior |
| title_full_unstemmed | Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behavior |
| title_short | Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behavior |
| title_sort | fatigue crack micromechanisms in a cu zn al shape memory alloy with pseudo elastic behavior |
| topic | Zn-Cu-Al alloy |
| url | https://www.fracturae.com/index.php/fis/article/view/1597 |
| work_keys_str_mv | AT vittoriodicocco fatiguecrackmicromechanismsinacuznalshapememoryalloywithpseudoelasticbehavior AT francescoiacoviello fatiguecrackmicromechanismsinacuznalshapememoryalloywithpseudoelasticbehavior AT stefanonatali fatiguecrackmicromechanismsinacuznalshapememoryalloywithpseudoelasticbehavior AT andreabrotzu fatiguecrackmicromechanismsinacuznalshapememoryalloywithpseudoelasticbehavior |