Hot forging behavior of Mg−8Al−4Ba−4Ca (ABaX844) alloy and validation of processing map
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
Standard
Magnesium Technology 2018. ed. / Kiran N. Solanki; Vineet Joshi; Neale R. Neelameggham; Dmytro Orlov. Springer International Publishing, 2018. p. 289-296 (Minerals, Metals and Materials Series; Vol. Part F7).
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - CHAP
T1 - Hot forging behavior of Mg−8Al−4Ba−4Ca (ABaX844) alloy and validation of processing map
AU - Rao, K. P.
AU - Dharmendra, C.
AU - Prasad, Y. V.R.K.
AU - Dieringa, H.
AU - Hort, N.
PY - 2018
Y1 - 2018
N2 - Newly developed die-cast alloys based on Mg–Al−Ba–Ca (ABaX) system show promise for high temperature creep resistance. ABaX844 alloy is one of them and it has limited workability due to high alloy content. To identify the optimum processing conditions, processing map for this alloy was developed earlier, which exhibited two workability domains in the temperature and strain rate ranges: (1) 340–410 °C and 0.0003–0.005 s−1and (2) 425–500 °C and 0.0003–0.1 s−1Dynamic recrystallization (DRX) occurs in these domains. The map also exhibited extensive flow instability mainly at strain rates > 0.01 s−1up to a temperature of 400 °C and at strain rates >0.1 s−1beyond 400 °C. The aim of the present study is to validate the findings of processing map by performing forging tests in the temperature range 300–500 °C (at an interval of 40 °C) and forging speeds of 0.01, 0.1, 1 and 10 mm s−1to produce a rib-web (cup) shape component. Finite-element (FE) simulations were performed for obtaining the variations of strain and strain rate in the components during forging. The microstructures of forged specimens deformed under optimum process conditions derived from the processing map revealed the formation of dynamically recrystallized grains. The alloy specimens forged under the conditions of flow instability have fractured and/or exhibited flow localization. The results validated the predictions of the processing map and the load-stroke curves obtained by FE simulation correlated well with the experimental curves.
AB - Newly developed die-cast alloys based on Mg–Al−Ba–Ca (ABaX) system show promise for high temperature creep resistance. ABaX844 alloy is one of them and it has limited workability due to high alloy content. To identify the optimum processing conditions, processing map for this alloy was developed earlier, which exhibited two workability domains in the temperature and strain rate ranges: (1) 340–410 °C and 0.0003–0.005 s−1and (2) 425–500 °C and 0.0003–0.1 s−1Dynamic recrystallization (DRX) occurs in these domains. The map also exhibited extensive flow instability mainly at strain rates > 0.01 s−1up to a temperature of 400 °C and at strain rates >0.1 s−1beyond 400 °C. The aim of the present study is to validate the findings of processing map by performing forging tests in the temperature range 300–500 °C (at an interval of 40 °C) and forging speeds of 0.01, 0.1, 1 and 10 mm s−1to produce a rib-web (cup) shape component. Finite-element (FE) simulations were performed for obtaining the variations of strain and strain rate in the components during forging. The microstructures of forged specimens deformed under optimum process conditions derived from the processing map revealed the formation of dynamically recrystallized grains. The alloy specimens forged under the conditions of flow instability have fractured and/or exhibited flow localization. The results validated the predictions of the processing map and the load-stroke curves obtained by FE simulation correlated well with the experimental curves.
KW - Dynamic recrystallization
KW - Hot forging
KW - Magnesium alloy
KW - Simulation
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85042413679&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-72332-7_45
DO - 10.1007/978-3-319-72332-7_45
M3 - Article in conference proceedings
AN - SCOPUS:85042413679
SN - 9783319723310
SN - 978-3-319-89171-2
T3 - Minerals, Metals and Materials Series
SP - 289
EP - 296
BT - Magnesium Technology 2018
A2 - Solanki, Kiran N.
A2 - Joshi, Vineet
A2 - Neelameggham, Neale R.
A2 - Orlov, Dmytro
PB - Springer International Publishing
T2 - International Symposium on Magnesium Technology 2018
Y2 - 11 March 2018 through 15 March 2018
ER -