D V V SATYANARAYANA
Articles written in Bulletin of Materials Science
Volume 19 Issue 6 December 1996 pp 1009-1015
Specimens of a nickel base superalloy were exposed to air at 1423 K to study the effect of gamma prime depletion in the near-surface region on the creep behaviour of the alloy. The results showed that the gamma prime depletion in the air-exposed specimens caused a weakening effect, leading to enhanced creep rate. Kachanov’s damage parameter
Volume 42 Issue 5 October 2019 Article ID 0234
Correlation of microstructure and mechanical properties of hot-rolled Fe–7 wt.% Al with varying carbon contents has been investigated in detail. The microstructures of the alloys change significantly with an increase in the carboncontent. An alloy with 0.012 wt.% carbon shows a single ferrite phase, whereas with increase in carbon up to 0.65 wt.%, the microstructure evolves into a dual phase consisting of ferrite and $\kappa$-pearlite. At about 1.5 wt.% carbon, the alloy exhibits only $\kappa$-pearlite and with a further increase in carbon to 2.2 wt.%, an additional phase starts precipitating in the form of graphite. The room temperature tensile strength of the alloy increased significantly with an increase in the carbon content, which is in agreement with the microstructure. The yield strength and hardness of the steels with different carbon contents can becorrelated well with the inter-barrier spacing in different steels.
Volume 42 | Issue 6
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