TY - GEN
T1 - The influence of nano TiN additions on mechanical properties and fracture behaviour of spark plasma sintered SAF 2205
AU - Oke, Samuel Ranti
AU - Mphahlele, Mahlatse R.
AU - Ige, Oladeji Oluremi
AU - Falodun, Oluwasegun Eso
AU - Obadele, Babatunde Abiodun
AU - Olubambi, Peter Apata
N1 - Publisher Copyright:
© Copyright 2017 MS&T17®.
PY - 2017
Y1 - 2017
N2 - The influences of TiN additions on microstructure, mechanical properties and fracture behaviour of the SAF 2205-TiN composites were investigated. Automated spark plasma sintering machine (model HHPD-25, FCT GmbH Germany) was used to fabricate the composites. Characterization was performed using Scanning Electron Microscopy. Archimedes principle was used to evaluate the densities of the composites. Hardness (H) and elastic modulus (E) were investigated by nanoindentation using load 1 mN. The results obtained indicated that SPS process parameters were optimized at 1150 °C, 15 min and 100 oC/min. The microstructure revealed that the TiN particles have a general tendency to segregate at the grain boundaries. The hardness (H) and elastic modulus (E) values increased with TiN contents due to the hardening and stiffening effects of the TiN reinforcements. With increase in TiN content, the dimples on the fracture surfaces of the composites reduced drastically with only faint traces of the dimples left. A combination of ductile and brittle fractures is prevalent in the 6 and 8 % TiN.
AB - The influences of TiN additions on microstructure, mechanical properties and fracture behaviour of the SAF 2205-TiN composites were investigated. Automated spark plasma sintering machine (model HHPD-25, FCT GmbH Germany) was used to fabricate the composites. Characterization was performed using Scanning Electron Microscopy. Archimedes principle was used to evaluate the densities of the composites. Hardness (H) and elastic modulus (E) were investigated by nanoindentation using load 1 mN. The results obtained indicated that SPS process parameters were optimized at 1150 °C, 15 min and 100 oC/min. The microstructure revealed that the TiN particles have a general tendency to segregate at the grain boundaries. The hardness (H) and elastic modulus (E) values increased with TiN contents due to the hardening and stiffening effects of the TiN reinforcements. With increase in TiN content, the dimples on the fracture surfaces of the composites reduced drastically with only faint traces of the dimples left. A combination of ductile and brittle fractures is prevalent in the 6 and 8 % TiN.
KW - Duplex stainless steel (SAF 2205)
KW - Fracture behavior
KW - Microstructure
KW - Spark plasma sintering (SPS)
KW - Titanium nitride (TiN)
UR - http://www.scopus.com/inward/record.url?scp=85047653597&partnerID=8YFLogxK
U2 - 10.7449/2017/MST-2017-1172-1174
DO - 10.7449/2017/MST-2017-1172-1174
M3 - Conference contribution
AN - SCOPUS:85047653597
T3 - Materials Science and Technology Conference and Exhibition 2017, MS and T 2017
SP - 1172
EP - 1174
BT - Materials Science and Technology Conference and Exhibition 2017, MS and T 2017
PB - Association for Iron and Steel Technology, AISTECH
T2 - Materials Science and Technology Conference and Exhibition 2017, MS and T 2017
Y2 - 8 October 2017 through 12 October 2017
ER -