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首页> 外文期刊>Engineering failure analysis >Failure analysis of M250 maraging steel stud used in Flex Nozzle Control actuator bracket of solid propulsion system
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Failure analysis of M250 maraging steel stud used in Flex Nozzle Control actuator bracket of solid propulsion system

机译：固体推进系统柔性喷嘴控制执行器支架中使用的M250马氏体时效螺栓的失效分析

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摘要

Maraging steels are considered to be excellent material for the aerospace application because of unique combination of performance characteristic i.e. high strength, high toughness and good formability [1,2]. A series of maraging steels are available with a strength range of 1500-2400 MPa. The application, where the fracture toughness/ductility are important, one uses maraging steel of relatively lower strength like M250 maraging steel, whereas the higher variants are used in application demanding high strength, even thereby adjusting with moderate fracture toughness e.g. M350 grade of maraging steel and so on. Usually it is found that the fracture toughness and ductility decreases for material attaining high strength. The 18% nickel maraging steel owes its outstanding characteristic due to certain specific features of iron-nickel based alloy [3]. Although carbon content is very low, maraging steels are highly alloyed with nickel, cobalt, molybdenum and derives their strength from age hardening of a low carbon, iron, nickel lath martensite [4].
机译：由于高强度，高韧性和良好的可成型性等性能特征的独特结合，马氏体时效钢被认为是航空航天应用的优良材料[1,2]。一系列马氏体时效钢的强度范围为1500-2400 MPa。在断裂韧性/延展性很重要的应用中，人们使用强度相对较低的马氏体钢（例如M250马氏体时效钢），而在要求高强度的应用中使用较高的变体，甚至可以通过中等断裂韧性进行调整，例如M350级马氏体时效钢等。通常发现，获得高强度的材料的断裂韧性和延展性降低。 18％镍马氏体时效钢由于铁镍基合金的某些特定特性而具有出色的性能[3]。尽管碳含量非常低，但马氏体时效钢与镍，钴，钼高度合金化，并从低碳，铁，镍板条马氏体的时效硬化中获得强度[4]。

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