Academic Journal

Optimizing hot tearing susceptibility of Al-5.5Zn-2.4 Mg-1.3Cu alloys by grain refinement, increasing mold and casting temperature

التفاصيل البيبلوغرافية
العنوان: Optimizing hot tearing susceptibility of Al-5.5Zn-2.4 Mg-1.3Cu alloys by grain refinement, increasing mold and casting temperature
المؤلفون: Pengfei Li, Yudong Sui, Yehua Jiang, Yanru Yuan, Haipeng Yang, Jinhuai Yang
المصدر: Materials & Design, Vol 246, Iss , Pp 113325- (2024)
بيانات النشر: Elsevier, 2024.
سنة النشر: 2024
المجموعة: LCC:Materials of engineering and construction. Mechanics of materials
مصطلحات موضوعية: Al-Zn-Mg-Cu alloy, Grain refinement, Hot tearing susceptibility, Pouring temperature, Mold temperature, Materials of engineering and construction. Mechanics of materials, TA401-492
الوصف: The Al-Zn-Mg-Cu alloy is widely used in automotive lightweighting and other applications due to its excellent mechanical properties. However, when this alloy is cast using metal molds, it exhibits high hot tearing susceptibility (HTS), increasing the risk of use. Volumetric shrinkage due to density differences during the transition from liquid to solid metal produces shrinkage stresses. At the same time, lacks feeding of the remaining liquid phase in the late solidification stage can also lead to hot tearing. The purpose of this paper is to present a device for quantitatively determining and optimizing HTS. The relationship between solidification shrinkage displacement and stress was tested in a quantitative way using a Self-designed T-tester equipped with stress and displacement sensors. The test results show that the reduction of grain size shifts the solidification shrinkage of the alloy and reduces the solidification shrinkage stress, which avoids hot tearing caused by higher solidification shrinkage stress and local stress inhomogeneity. Secondly, the grain size reduction increases the number of feeding channels in the solidification vulnerable stage, and more liquid phase is available for crack healing. In addition, the influence of casting process parameters on the HTS was studied.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 0264-1275
Relation: http://www.sciencedirect.com/science/article/pii/S0264127524007007; https://doaj.org/toc/0264-1275
DOI: 10.1016/j.matdes.2024.113325
URL الوصول: https://doaj.org/article/a358697af805460db449b0792b6e7df2
رقم الانضمام: edsdoj.358697af805460db449b0792b6e7df2
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:02641275
DOI:10.1016/j.matdes.2024.113325