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Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts

Non-heat-treated Al-Mg-based die casting alloys have been developed for the structural parts of automobiles. In previous studies, alloy compositions with at least 1.0%Si have been proposed to reduce the hot tearing susceptibility (HTS). On the other hand, the increase in the Si content reduces the d...

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Main Authors: Nagata, Yoshihiro, Kato, Kiyotaka, Shishido, Takuma, Tsuchiya, Ao, Kitaoka, Sanji, Oshiro, Naoto, Nishi, Naomi, Nonaka, Naoki, Koike, Takayuki, Oike, Toshimitsu, Hayashi, Kenji, Kambe, Hiroshi, Okane, Toshimitsu, Muhammad, Khairi Faiz, Yoshida, Makoto
Format: Article
Published: Springer 2024
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TJ Mechanical engineering and machinery
Online Access:http://eprints.um.edu.my/44331/
https://doi.org/10.1007/s40962-023-01047-0
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spelling my.um.eprints.443312024-07-09T03:20:48Z http://eprints.um.edu.my/44331/ Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts Nagata, Yoshihiro Kato, Kiyotaka Shishido, Takuma Tsuchiya, Ao Kitaoka, Sanji Oshiro, Naoto Nishi, Naomi Nonaka, Naoki Koike, Takayuki Oike, Toshimitsu Hayashi, Kenji Kambe, Hiroshi Okane, Toshimitsu Muhammad, Khairi Faiz Yoshida, Makoto TJ Mechanical engineering and machinery Non-heat-treated Al-Mg-based die casting alloys have been developed for the structural parts of automobiles. In previous studies, alloy compositions with at least 1.0%Si have been proposed to reduce the hot tearing susceptibility (HTS). On the other hand, the increase in the Si content reduces the ductility. For some automotive body structures, Al-Mg alloy die castings with Si content exceeding 1.0% should not have the required ductility. This study aims to develop an Al-Mg alloy with both high ductility and low HTS by investigating the following three characteristics of an Al-4.5Mg-1.0Mn alloy with 0.2%Si added: (1) additional elements to reduce the HTS, (2) the associated mechanical properties (requirements for the automotive company: 0.2% proof stress >= 140 MPa and fracture elongation >= 15%), and (3) the mechanism of decreasing the HTS. It was revealed that the co-addition of 0.025%Sr, 0.08%Ti, and 0.016%B reduced the HTS when the hydrogen content of the melt was 0.5-1.0 mL/100 g Al. Furthermore, the 0.2% proof stress and fracture elongation of a lower link arm produced via HPDC with the above composition were found to achieve the requirements. It was also indicated that the mechanism of decrease in the HTS by the Sr addition should result from the decrease in the thermal tensile load due to the formation of hydrogen porosity at a lower solid fraction than that without Sr. It is suggested that when 0.025%Sr, 0.08%Ti, and 0.016%B are added to the Al-4.5Mg-1.0Mn-0.2Si alloy, non-heat-treated automotive structural parts with both high ductility and low HTS will be obtained by high-pressure die casting. Springer 2024-01 Article PeerReviewed Nagata, Yoshihiro and Kato, Kiyotaka and Shishido, Takuma and Tsuchiya, Ao and Kitaoka, Sanji and Oshiro, Naoto and Nishi, Naomi and Nonaka, Naoki and Koike, Takayuki and Oike, Toshimitsu and Hayashi, Kenji and Kambe, Hiroshi and Okane, Toshimitsu and Muhammad, Khairi Faiz and Yoshida, Makoto (2024) Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts. International Journal of Metalcasting, 18 (1). pp. 46-59. ISSN 1939-5981, DOI https://doi.org/10.1007/s40962-023-01047-0 <https://doi.org/10.1007/s40962-023-01047-0>. https://doi.org/10.1007/s40962-023-01047-0 10.1007/s40962-023-01047-0
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Nagata, Yoshihiro
Kato, Kiyotaka
Shishido, Takuma
Tsuchiya, Ao
Kitaoka, Sanji
Oshiro, Naoto
Nishi, Naomi
Nonaka, Naoki
Koike, Takayuki
Oike, Toshimitsu
Hayashi, Kenji
Kambe, Hiroshi
Okane, Toshimitsu
Muhammad, Khairi Faiz
Yoshida, Makoto
Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts
description Non-heat-treated Al-Mg-based die casting alloys have been developed for the structural parts of automobiles. In previous studies, alloy compositions with at least 1.0%Si have been proposed to reduce the hot tearing susceptibility (HTS). On the other hand, the increase in the Si content reduces the ductility. For some automotive body structures, Al-Mg alloy die castings with Si content exceeding 1.0% should not have the required ductility. This study aims to develop an Al-Mg alloy with both high ductility and low HTS by investigating the following three characteristics of an Al-4.5Mg-1.0Mn alloy with 0.2%Si added: (1) additional elements to reduce the HTS, (2) the associated mechanical properties (requirements for the automotive company: 0.2% proof stress >= 140 MPa and fracture elongation >= 15%), and (3) the mechanism of decreasing the HTS. It was revealed that the co-addition of 0.025%Sr, 0.08%Ti, and 0.016%B reduced the HTS when the hydrogen content of the melt was 0.5-1.0 mL/100 g Al. Furthermore, the 0.2% proof stress and fracture elongation of a lower link arm produced via HPDC with the above composition were found to achieve the requirements. It was also indicated that the mechanism of decrease in the HTS by the Sr addition should result from the decrease in the thermal tensile load due to the formation of hydrogen porosity at a lower solid fraction than that without Sr. It is suggested that when 0.025%Sr, 0.08%Ti, and 0.016%B are added to the Al-4.5Mg-1.0Mn-0.2Si alloy, non-heat-treated automotive structural parts with both high ductility and low HTS will be obtained by high-pressure die casting.
format Article
author Nagata, Yoshihiro
Kato, Kiyotaka
Shishido, Takuma
Tsuchiya, Ao
Kitaoka, Sanji
Oshiro, Naoto
Nishi, Naomi
Nonaka, Naoki
Koike, Takayuki
Oike, Toshimitsu
Hayashi, Kenji
Kambe, Hiroshi
Okane, Toshimitsu
Muhammad, Khairi Faiz
Yoshida, Makoto
author_facet Nagata, Yoshihiro
Kato, Kiyotaka
Shishido, Takuma
Tsuchiya, Ao
Kitaoka, Sanji
Oshiro, Naoto
Nishi, Naomi
Nonaka, Naoki
Koike, Takayuki
Oike, Toshimitsu
Hayashi, Kenji
Kambe, Hiroshi
Okane, Toshimitsu
Muhammad, Khairi Faiz
Yoshida, Makoto
author_sort Nagata, Yoshihiro
title Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts
title_short Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts
title_full Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts
title_fullStr Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts
title_full_unstemmed Development of high-ductility and low-hot-tearing-susceptibility non-heat treatment Al-Mg-Mn-Based die casting alloy for automotive structural parts
title_sort development of high-ductility and low-hot-tearing-susceptibility non-heat treatment al-mg-mn-based die casting alloy for automotive structural parts
publisher Springer
publishDate 2024
url http://eprints.um.edu.my/44331/
https://doi.org/10.1007/s40962-023-01047-0
_version_ 1805881160164704256
score 13.211869

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