Mechanical Wave Propagation in Solidifying Al-Cu-Mn-Ti Alloy and Its Effect on Solidification Feeding
The wave field in solidifying metals is the theoretical basis for analyzing the effects of mechanical vibration on solidification, but there is little research on this topic. This study investigated the wave field and its effect on the solidification feeding in the low-pressure sand casting (LPSC) o...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-11-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/12/12/2001 |
| _version_ | 1797456343631659008 |
|---|---|
| author | Wei Chen Shiping Wu Rujia Wang |
| author_facet | Wei Chen Shiping Wu Rujia Wang |
| author_sort | Wei Chen |
| collection | DOAJ |
| description | The wave field in solidifying metals is the theoretical basis for analyzing the effects of mechanical vibration on solidification, but there is little research on this topic. This study investigated the wave field and its effect on the solidification feeding in the low-pressure sand casting (LPSC) of Al-Cu-Mn-Ti alloy through experimental and numerical investigation. The solidification temperature field was simulated by Anycasting<sup>TM</sup>, and the wave field was simulated by the self-developed wave propagation software. The shrinkage defect detection showed that applying vibration had a greater promotional effect on feeding than increasing the holding pressure. The predicted defects under vibration coincided with the detections. The displacement field showed that the casting vibrated harmonically with an inhomogeneous amplitude distribution under the continuous harmonic vibration excitation, and the vibration energy was mainly concentrated in the feeding channel. With solidification, the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>u</mi><mi>x</mi></msub></mrow></semantics></math></inline-formula> amplitude reduced rapidly after the overlapping of dendrites, finally reducing slowly to a certain level; the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>u</mi><mi>y</mi></msub></mrow></semantics></math></inline-formula> amplitude reduced dramatically after the occurrence of a quasi-solid phase, finally reducing slowly to near zero. Mechanical vibration produced a severe shear deformation in the quasi-liquid phase—especially in the lower feeding channel—reducing the grain size to promote mass feeding. The feeding pressure and feeding gap were changed periodically under vibration, causing the vibration-promoting interdendritic feeding rate to fluctuate and eventually stabilize at about 13.4%. The mechanical vibration can increase the feeding pressure difference and change the blockage structure simultaneously, increasing the formation probability of burst feeding. |
| first_indexed | 2024-03-09T16:06:27Z |
| format | Article |
| id | doaj.art-ab3c0546c4fe4374b27618aa0843c161 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T16:06:27Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-ab3c0546c4fe4374b27618aa0843c1612023-11-24T16:39:10ZengMDPI AGMetals2075-47012022-11-011212200110.3390/met12122001Mechanical Wave Propagation in Solidifying Al-Cu-Mn-Ti Alloy and Its Effect on Solidification FeedingWei Chen0Shiping Wu1Rujia Wang2School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaThe wave field in solidifying metals is the theoretical basis for analyzing the effects of mechanical vibration on solidification, but there is little research on this topic. This study investigated the wave field and its effect on the solidification feeding in the low-pressure sand casting (LPSC) of Al-Cu-Mn-Ti alloy through experimental and numerical investigation. The solidification temperature field was simulated by Anycasting<sup>TM</sup>, and the wave field was simulated by the self-developed wave propagation software. The shrinkage defect detection showed that applying vibration had a greater promotional effect on feeding than increasing the holding pressure. The predicted defects under vibration coincided with the detections. The displacement field showed that the casting vibrated harmonically with an inhomogeneous amplitude distribution under the continuous harmonic vibration excitation, and the vibration energy was mainly concentrated in the feeding channel. With solidification, the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>u</mi><mi>x</mi></msub></mrow></semantics></math></inline-formula> amplitude reduced rapidly after the overlapping of dendrites, finally reducing slowly to a certain level; the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>u</mi><mi>y</mi></msub></mrow></semantics></math></inline-formula> amplitude reduced dramatically after the occurrence of a quasi-solid phase, finally reducing slowly to near zero. Mechanical vibration produced a severe shear deformation in the quasi-liquid phase—especially in the lower feeding channel—reducing the grain size to promote mass feeding. The feeding pressure and feeding gap were changed periodically under vibration, causing the vibration-promoting interdendritic feeding rate to fluctuate and eventually stabilize at about 13.4%. The mechanical vibration can increase the feeding pressure difference and change the blockage structure simultaneously, increasing the formation probability of burst feeding.https://www.mdpi.com/2075-4701/12/12/2001mechanical vibrationAl-Cu-Mn-Ti alloylow-pressure castingsolidification feedingwave simulation |
| spellingShingle | Wei Chen Shiping Wu Rujia Wang Mechanical Wave Propagation in Solidifying Al-Cu-Mn-Ti Alloy and Its Effect on Solidification Feeding Metals mechanical vibration Al-Cu-Mn-Ti alloy low-pressure casting solidification feeding wave simulation |
| title | Mechanical Wave Propagation in Solidifying Al-Cu-Mn-Ti Alloy and Its Effect on Solidification Feeding |
| title_full | Mechanical Wave Propagation in Solidifying Al-Cu-Mn-Ti Alloy and Its Effect on Solidification Feeding |
| title_fullStr | Mechanical Wave Propagation in Solidifying Al-Cu-Mn-Ti Alloy and Its Effect on Solidification Feeding |
| title_full_unstemmed | Mechanical Wave Propagation in Solidifying Al-Cu-Mn-Ti Alloy and Its Effect on Solidification Feeding |
| title_short | Mechanical Wave Propagation in Solidifying Al-Cu-Mn-Ti Alloy and Its Effect on Solidification Feeding |
| title_sort | mechanical wave propagation in solidifying al cu mn ti alloy and its effect on solidification feeding |
| topic | mechanical vibration Al-Cu-Mn-Ti alloy low-pressure casting solidification feeding wave simulation |
| url | https://www.mdpi.com/2075-4701/12/12/2001 |
| work_keys_str_mv | AT weichen mechanicalwavepropagationinsolidifyingalcumntialloyanditseffectonsolidificationfeeding AT shipingwu mechanicalwavepropagationinsolidifyingalcumntialloyanditseffectonsolidificationfeeding AT rujiawang mechanicalwavepropagationinsolidifyingalcumntialloyanditseffectonsolidificationfeeding |