Journal ArticleDOI
Tensile properties and fracture toughness of 18Ni (250 grade) maraging steel weldments
C. R. Shamantha,Ramaswamy Narayanan,K. J. L. Iyer,V.M. Radhakrishnan,S.K. Seshadri,S. Sundararajan,S. Sundaresan +6 more
TLDR
Gas tungsten arc welding was performed on 18Ni (250 grade) maraging steel sheet using two different filler wires: one of the same composition as the base material and the other containing more cobalt and aluminium and less molybdenum and titanium as mentioned in this paper.Abstract:
Gas tungsten arc welding was performed on 18Ni (250 grade) maraging steel sheet using two different filler wires: one of the same composition as the base material and the other containing more cobalt and aluminium and less molybdenum and titanium. Weld specimens were then aged under four different sets of conditions. After metallographic characterisation, mechanical properties including hardness, tensile strength and ductility, and fracture toughness were evaluated. Results showed that use of the matching filler material led to lower strength but higher ductility than in the other case; this was attributed to the presence of reverted austenite in the former (caused by segregation, especially of molybdenum) at the fusion zone substructure boundaries. In both types of weld metal, a re-solution treatment followed by aging at 480°C resulted in optimum tensile properties. Fracture toughness of the aged weldments was in general close to that of the parent material aged at 480°C; some deterioration occur...read more
Citations
More filters
Journal ArticleDOI
Austenite reversion in 18% Ni maraging steel and its weldments
TL;DR: In this paper, a review of the published work on austenite reversion and its effects on properties and performance, covering both base metal and weld joints, is presented, where the authors analyze the impact of the reversion on the performance of the weld joints.
Journal ArticleDOI
Effect of post-weld heat treatments on strength and toughness behavior of T-250 maraging steel welded by laser beam
TL;DR: In this article, the strength and toughness behavior of T-250 maraging steel welded by laser beam under different approaches of three post-weld heat treatments, i.e., aging (A), solutionizing+aging (SA), and homogenizing+solutionizing +aging (HSA), were investigated.
Journal ArticleDOI
Stress corrosion cracking of maraging steel weldments
K. Y. Sastry,Ramaswamy Narayanan,C. R. Shamantha,S. Sundaresan,S.K. Seshadri,V.M. Radhakrishnan,K. J. L. Iyer,S. Sundararajan +7 more
TL;DR: In this article, the authors investigated the stress corrosion characteristics of 18 wt-%Ni (MDN-250) maraging steel and its weldments made under different welding conditions.
Journal ArticleDOI
Effect of Cyclic Aging on Mechanical Properties and Microstructure of Maraging Steel 250
TL;DR: In this paper, the effects of thermal cyclic aging on mechanical properties and microstructure of maraging steel 250 were studied using hardness tester, tensile testing machine, impact tester and optical, scanning electron, and stereo microscopy.
Journal ArticleDOI
A critical review on susceptibility of stress corrosion cracking in maraging steel weldments
TL;DR: In this article, the effect of different filler materials and composition of the filler material were also investigated to understand the SCC behavior for the weldment of 18 Ni maraging steel.
References
More filters
Journal ArticleDOI
The strength and fracture toughness of 18 Ni (350) maraging steel
H. J. Rack,David Kalish +1 more
TL;DR: In this article, the influence of microstructure on the strength and fracture toughness of 18 Ni maraging steel was examined by X-ray and neutron diffraction and by optical and electron microscopy.
Journal ArticleDOI
The fracture toughness behaviour of a 18 Ni (300 grade) maraging steel in various solution treated and aged conditions
TL;DR: In this paper, the presence of particules de carbure de titane is investigated vis-a-vis de la tenacite and a plus d'importance que les autres caracteristiques microstructurales.
Journal ArticleDOI
Effects of solution treatment temperatures on microstructure, tensile and fracture properties of Co-free 18 Ni maraging steel
TL;DR: In this article, the influence of solution treatment temperatures (S.T.) on microstructure, tensile and fracture properties of 18 Ni cobalt free maraging steel is discussed in light of the prevailing microstructural conditions.