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.

在许多应用领域中，对轻量级结构的需求伴随着增加使用高强度钢的需求。由于这种发展，当存在某些条件时，高强度钢组件因氢诱导的应力腐蚀破裂（H-SCC）而失败的风险很大。对于H-SCC的出现，必须满足以下要求：例如，例如。残余应力，操作压力水供应，例如材料的制造（腌制过程）或操作（腐蚀）条件，例如高强度，表面微观结构，三角洲铁矿。因此，基本需要进行研究，以收集了解材料状况的基本机制及其对H-SCC的易感性之间的基本机制，从而对H-SCC的易感性及其对基于微观结构的机制进行了对H-SCC的迁移，该机制是对H-SCC的系统，该机制是对H-SCC的最新机制，该机制是b的，bscc beccc of Sccc beccc beccc by n sccc becc becc beccc beccc becc becc cccc beccc beccc beccc beccc beccc a cacc的范围很高。考虑到材料的影响，机械性能，微结构，硬化程序（淬火，矫正或bainitic）和表面状态。从这些发现中，制定了基于机械性的概念模型，该模型描述了特定于材料条件的因素及其相对影响，其对高强度钢对H-SCC的敏感性的贡献方面描述了它们的相对影响。