权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Influence of material condition and surface properties of high strength steels with regard to their susceptibility to hydrogen-induced stress corrosion cracking

高强度钢的材料状况和表面性能对其氢致应力腐蚀开裂敏感性的影响

基本信息

批准号：
244991705
负责人：
Professor Dr.-Ing. Matthias Oechsner
金额：
--
依托单位：
Fachgebiet und Institut für Werkstoffkunde
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/244991705?language=en
关键词：
Influence material condition surface properties

项目摘要

The need for lightweight construction in many fields of application comes along with the demand for an increased use of high strength steels. Due to this development there is a considerable risk for high-strength steel components to fail by hydrogen-induced stress corrosion cracking (H-SCC), when certain conditions are present.The following requirements must be met for the occurrence of H-SCC:Stress, e.g. residual stress, operational stressHydrogen supply, e.g. from manufacturing (pickling process) or operation (corrosion)Condition of the material, for example high strength, surface microstructure, delta ferrite.Therefore, there is a fundamental need for research to gather knowledge of the fundamental mechanisms between the condition of the material and its susceptibility to H-SCC and thereby the microstructural based mechanisms, which are responsible for H-SCC.Based on recent phenomenological findings, systematical investigations are carried out, taking into account the influence of the material, the mechanical properties, the microstructure, the hardening procedure (quenched and tempered or bainitic) and the surface state. From the findings, a mecha-nism based conceptual model is formulated, that describes the material condition-specific factors and their relative influence in terms of their contribution to the susceptibility of high strength steels to H-SCC.

许多应用领域对轻质结构的需求沿着而来的是对高强度钢使用量的增加。由于这种发展，当存在某些条件时，高强度钢部件因氢致应力腐蚀开裂（H-SCC）而失效的风险相当大。发生H-SCC时必须满足以下要求：应力，例如残余应力、工作应力氢供应，例如来自制造（酸洗工艺）或操作（腐蚀）材料的状况，例如高强度、表面微观结构、δ铁素体。因此，基本上需要进行研究以收集材料状况与其对H-SCC的敏感性之间的基本机制的知识，从而收集导致H-SCC的基于微观结构的机制的知识。基于最近的现象学发现，进行了系统的研究，考虑到材料、机械性能、显微组织、硬化过程（淬火和回火或贝氏体）和表面状态的影响。根据研究结果，建立了一个基于力学的概念模型，该模型描述了高强度钢对H-SCC敏感性的材料条件特异性因素及其相对影响。