Mechanical property strengthening by post-heat treatments in NiTiCu shape memory alloys fabricated by twin-wire arc additive manufacturing
To address the challenges of wide transformation hysteresis as well as the poor properties of NiTi-based alloys fabricated by twin-wire arc additive manufacturing, post-heat treatments were employed in as-deposited NiTiCu alloys. After aging at 450°C, 550°C, and 650°C, the alloys exhibited significa...
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-12-01
|
| Series: | Virtual and Physical Prototyping |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/17452759.2025.2457579 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832584063255314432 |
|---|---|
| author | Long Chen Miao Zhao Jiehao Wu J. P. Oliveira Fissha Biruke Teshome Bowen Pang Jiajia Shen Yiming Wu Naixun Zhou Norbert Schell Zhi Zeng |
| author_facet | Long Chen Miao Zhao Jiehao Wu J. P. Oliveira Fissha Biruke Teshome Bowen Pang Jiajia Shen Yiming Wu Naixun Zhou Norbert Schell Zhi Zeng |
| author_sort | Long Chen |
| collection | DOAJ |
| description | To address the challenges of wide transformation hysteresis as well as the poor properties of NiTi-based alloys fabricated by twin-wire arc additive manufacturing, post-heat treatments were employed in as-deposited NiTiCu alloys. After aging at 450°C, 550°C, and 650°C, the alloys exhibited significant reduction in the precipitate sizes, narrow transformation hysteresis, uniform distribution of microhardness, and substantial improvement in mechanical properties. With the increase of the aging temperature, the matrix grain size and the precipitate size coarsened, which was detrimental to the resultant mechanical properties. The alloys aged at 450°C exhibited the narrowest transformation hysteresis of 11.7°C and optimal mechanical properties (tensile strength of 539 MPa and fracture strain of 6.9%). The enhancement of mechanical properties can be attributed to the smaller matrix grain size and precipitate size and the higher proportion of high-angle grain boundaries in this material condition. This work provides practical significance for the twin-wire arc additive manufacturing and performance optimisation of NiTi-based ternary alloys. |
| format | Article |
| id | doaj-art-4a729415c99040088c1aede312d81f4f |
| institution | Kabale University |
| issn | 1745-2759 1745-2767 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Virtual and Physical Prototyping |
| spelling | doaj-art-4a729415c99040088c1aede312d81f4f2025-01-27T18:45:00ZengTaylor & Francis GroupVirtual and Physical Prototyping1745-27591745-27672025-12-0120110.1080/17452759.2025.2457579Mechanical property strengthening by post-heat treatments in NiTiCu shape memory alloys fabricated by twin-wire arc additive manufacturingLong Chen0Miao Zhao1Jiehao Wu2J. P. Oliveira3Fissha Biruke Teshome4Bowen Pang5Jiajia Shen6Yiming Wu7Naixun Zhou8Norbert Schell9Zhi Zeng10School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People’s Republic of ChinaSchool of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People’s Republic of ChinaSchool of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People’s Republic of ChinaCENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica, PortugalSchool of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People’s Republic of ChinaSchool of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People’s Republic of ChinaCENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica, PortugalSchool of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People’s Republic of ChinaSchool of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People’s Republic of ChinaInstitute of Materials Physics, Helmholtz-Zentrum Hereon, Geesthacht, GermanySchool of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People’s Republic of ChinaTo address the challenges of wide transformation hysteresis as well as the poor properties of NiTi-based alloys fabricated by twin-wire arc additive manufacturing, post-heat treatments were employed in as-deposited NiTiCu alloys. After aging at 450°C, 550°C, and 650°C, the alloys exhibited significant reduction in the precipitate sizes, narrow transformation hysteresis, uniform distribution of microhardness, and substantial improvement in mechanical properties. With the increase of the aging temperature, the matrix grain size and the precipitate size coarsened, which was detrimental to the resultant mechanical properties. The alloys aged at 450°C exhibited the narrowest transformation hysteresis of 11.7°C and optimal mechanical properties (tensile strength of 539 MPa and fracture strain of 6.9%). The enhancement of mechanical properties can be attributed to the smaller matrix grain size and precipitate size and the higher proportion of high-angle grain boundaries in this material condition. This work provides practical significance for the twin-wire arc additive manufacturing and performance optimisation of NiTi-based ternary alloys.https://www.tandfonline.com/doi/10.1080/17452759.2025.2457579Twin-wire arc additive manufacturingpost-heat treatmentprecipitatesphase transformationmechanical properties |
| spellingShingle | Long Chen Miao Zhao Jiehao Wu J. P. Oliveira Fissha Biruke Teshome Bowen Pang Jiajia Shen Yiming Wu Naixun Zhou Norbert Schell Zhi Zeng Mechanical property strengthening by post-heat treatments in NiTiCu shape memory alloys fabricated by twin-wire arc additive manufacturing Virtual and Physical Prototyping Twin-wire arc additive manufacturing post-heat treatment precipitates phase transformation mechanical properties |
| title | Mechanical property strengthening by post-heat treatments in NiTiCu shape memory alloys fabricated by twin-wire arc additive manufacturing |
| title_full | Mechanical property strengthening by post-heat treatments in NiTiCu shape memory alloys fabricated by twin-wire arc additive manufacturing |
| title_fullStr | Mechanical property strengthening by post-heat treatments in NiTiCu shape memory alloys fabricated by twin-wire arc additive manufacturing |
| title_full_unstemmed | Mechanical property strengthening by post-heat treatments in NiTiCu shape memory alloys fabricated by twin-wire arc additive manufacturing |
| title_short | Mechanical property strengthening by post-heat treatments in NiTiCu shape memory alloys fabricated by twin-wire arc additive manufacturing |
| title_sort | mechanical property strengthening by post heat treatments in niticu shape memory alloys fabricated by twin wire arc additive manufacturing |
| topic | Twin-wire arc additive manufacturing post-heat treatment precipitates phase transformation mechanical properties |
| url | https://www.tandfonline.com/doi/10.1080/17452759.2025.2457579 |
| work_keys_str_mv | AT longchen mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT miaozhao mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT jiehaowu mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT jpoliveira mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT fisshabiruketeshome mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT bowenpang mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT jiajiashen mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT yimingwu mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT naixunzhou mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT norbertschell mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing AT zhizeng mechanicalpropertystrengtheningbypostheattreatmentsinniticushapememoryalloysfabricatedbytwinwirearcadditivemanufacturing |