Hybrid Taguchi-PCA-utility approach for simultaneous optimisation of multiple responses in turning alloy steel

Author(s):  
Mst. Nazma Sultana ◽  
Prianka B. Zaman ◽  
N. R. Dhar
Author(s):  
M.T. Jahn ◽  
J.C. Yang ◽  
C.M. Wan

4340 Ni-Cr-Mo alloy steel is widely used due to its good combination of strength and toughness. The mechanical property of 4340 steel can be improved by various thermal treatments. The influence of thermomechanical treatment (TMT) has been studied in a low carbon Ni-Cr-Mo steel having chemical composition closed to 4340 steel. TMT of 4340 steel is rarely examined up to now. In this study we obtain good improvement on the mechanical property of 4340 steel by TMT. The mechanism is explained in terms of TEM microstructures4340 (0.39C-1.81Ni-0.93Cr-0.26Mo) steel was austenitized at 950°C for 30 minutes. The TMTed specimen (T) was obtained by forging the specimen continuously as the temperature of the specimen was decreasing from 950°C to 600°C followed by oil quenching to room temperature. The thickness reduction ratio by forging is 40%. The conventional specimen (C) was obtained by quenching the specimen directly into room temperature oil after austenitized at 950°C for 30 minutes. All quenched specimens (T and C) were then tempered at 450, 500, 550, 600 or 650°C for four hours respectively.


2018 ◽  
Vol 13 (2) ◽  
pp. 165-186 ◽  
Author(s):  
Finn Fordham

Aesthetic moments of revelation – intense, sensual, internal, and individual –are so key to modernist culture that the idea of them in criticism has become commonplace. Here I seek to breath life into this humdrum formula of modernist criticism by exploring multiple responses to an alternative moment amongst British cultural figures: the declaration of War against Germany at 11.15 on September 3rd, 1939. This was also an intense moment, but it was social, political, communal, mediated and disseminated publicly by new technologies. As my archival research here reveals, a wide spectrum of responses were recorded, so we can think of such a moment as ‘prismatic’. I will also show how this moment was a shock to culture, which went into a state of suspended animation. As well as offering critiques of the moment as a fetishised form, I argue that modernist culture and the idea of the moment would never be the same again.


2018 ◽  
Vol 32 (3) ◽  
pp. 20
Author(s):  
Manas Kumar Saha ◽  
Ritesh Hazra ◽  
Ajit Mondal ◽  
Santanu Das

Author(s):  
Diego Boschetti ◽  
Ana Paola Braga ◽  
Paula Fernanda da Silva Farina

Alloy Digest ◽  
1969 ◽  
Vol 18 (12) ◽  

Abstract AISI C1060 is a high-carbon water or oil hardening tool and spring steel recommended for heavy machinery parts, shafts, springs and miscellaneous tools requiring strength and wear resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: CS-32. Producer or source: Carbon and alloy steel mills.


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