Abstract
Solidification processing is widely used for synthesizing fiber reinforced aluminum matrix composites. Some recent studies have used cooling through reinforcing carbon fibers to obtain better control over the solidification microstructure of cast metal-matrix composites. The present study is focused on understanding the effect of active cooling and the role of nickel coating on the structure of the composite. Multiphysics analysis is conducted to simulate the composite system and obtain temperature distribution and stresses at various stages of cooling. The analysis is limited to cooling of the liquid melt and the solidification processes is not modeled. Results show that the direction of the heat flux along the fiber can reverse as the system is allowed to cool. The results show that the von-Mises stresses do not have a severe gradient in the nickel coating but the shear stress gradient is very steep. If the structure solidifies with steep heat flux gradient and high interfacial shear stresses then the nickel coating of the fibers can fail. The analysis shows that the failure of the nickel coating can occur under the effect of thermal stresses generated in the system as a result of temperature gradients.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 916-925 |
| Number of pages | 10 |
| Journal | Composites Part B: Engineering |
| Volume | 42 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jun 2011 |
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Keywords
- A. Metal-matrix composites (MMCs)
- B. Interface/interphase
- C. Finite element analysis (FEA)
- E. Casting
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials
- Industrial and Manufacturing Engineering
- Mechanical Engineering
Cite this
Analysis of active cooling through nickel coated carbon fibers in the solidification processing of aluminum matrix composites. / Gupta, Nikhil; Nguyen, Nguyen Q.; Rohatgi, Pradeep K.
In: Composites Part B: Engineering, Vol. 42, No. 4, 06.2011, p. 916-925.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Analysis of active cooling through nickel coated carbon fibers in the solidification processing of aluminum matrix composites
AU - Gupta, Nikhil
AU - Nguyen, Nguyen Q.
AU - Rohatgi, Pradeep K.
PY - 2011/6
Y1 - 2011/6
N2 - Solidification processing is widely used for synthesizing fiber reinforced aluminum matrix composites. Some recent studies have used cooling through reinforcing carbon fibers to obtain better control over the solidification microstructure of cast metal-matrix composites. The present study is focused on understanding the effect of active cooling and the role of nickel coating on the structure of the composite. Multiphysics analysis is conducted to simulate the composite system and obtain temperature distribution and stresses at various stages of cooling. The analysis is limited to cooling of the liquid melt and the solidification processes is not modeled. Results show that the direction of the heat flux along the fiber can reverse as the system is allowed to cool. The results show that the von-Mises stresses do not have a severe gradient in the nickel coating but the shear stress gradient is very steep. If the structure solidifies with steep heat flux gradient and high interfacial shear stresses then the nickel coating of the fibers can fail. The analysis shows that the failure of the nickel coating can occur under the effect of thermal stresses generated in the system as a result of temperature gradients.
AB - Solidification processing is widely used for synthesizing fiber reinforced aluminum matrix composites. Some recent studies have used cooling through reinforcing carbon fibers to obtain better control over the solidification microstructure of cast metal-matrix composites. The present study is focused on understanding the effect of active cooling and the role of nickel coating on the structure of the composite. Multiphysics analysis is conducted to simulate the composite system and obtain temperature distribution and stresses at various stages of cooling. The analysis is limited to cooling of the liquid melt and the solidification processes is not modeled. Results show that the direction of the heat flux along the fiber can reverse as the system is allowed to cool. The results show that the von-Mises stresses do not have a severe gradient in the nickel coating but the shear stress gradient is very steep. If the structure solidifies with steep heat flux gradient and high interfacial shear stresses then the nickel coating of the fibers can fail. The analysis shows that the failure of the nickel coating can occur under the effect of thermal stresses generated in the system as a result of temperature gradients.
KW - A. Metal-matrix composites (MMCs)
KW - B. Interface/interphase
KW - C. Finite element analysis (FEA)
KW - E. Casting
UR - http://www.scopus.com/inward/record.url?scp=79954437562&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79954437562&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2011.01.004
DO - 10.1016/j.compositesb.2011.01.004
M3 - Article
AN - SCOPUS:79954437562
VL - 42
SP - 916
EP - 925
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
SN - 1359-8368
IS - 4
ER -