... to be discussed [2] [l] [5]. The steels for icebreakers are required to have (i) high resistance to local corrosion in seawater, (ii) high toughness at low temperature and (iii) good weldability. In this paper, the local corrosion of high strength steel of Y.P. 440 N/mm 2 class manufactured by a thermo...

...Proceedmgs of the Fllst PacifiC/Asia OffshOle Mechamcs SymposIUm Seoul, KOIea, 24-28 June, 1990 COPYright © 1990 by The Intel natIOnal Souety ofOffshOle alld Polm EngllleelS EFFECT OF TOUGHNESS AND HAZ UNDERMATCHING ON BRITTLE FRACTURE OF WELDED JOINTS IN STRESS CONCENTRATION Y Haglwara and T Inoue...

... Zone) in the HAZ. Factors influencing the microscopic toughness of the LBZ and measures to prevent low CTOD value have been studied (OMAE, 1988),(OMAE, 1989) and new steels which have high HAZ CTOD value have been developed (e.g. Chijiiwa et aI, 1988). For improving the LBZ toughness, selection...

... ABSTRACT: Toughness and microstructure of HSLA welds reheated by successive welds was studied. Toughness changes can be classified into four categories by attained peak temperature. The causes of embrittlement are increasing of GBF, MAC, and effective grain size and the main governing factors...

... ABSTRACT: While recently developed platform steels have excellent low temperature toughness properties they may be nevertheless, susceptible to cleavage fracture initiation at focally brittle zones (LBZ" s) developed in coarse grain heat affected zones (CGHAZ" s) of welds. Current offshore...

... ABSTRACT: The demand of high strength steel for ship and offshore structure application has been changed from conventionally heat treated steel to TMCP steel, because the latter provides the improved strength - toughness balance and weldability. Enhanced property of TMCP steel comes from...