Volume 6A: Materials and Fabrication最新文献_第8页

Consideration on Tempering and PWHT Temperatures of C-Mn and Low Alloy Steels Used for the Fabrication of Pressure Vessels: Smart Tuning of Heat Treatment Parameters 压力容器用C-Mn及低合金钢回火和PWHT温度的考虑:热处理参数的智能调整

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84004

S. Pillot, M. Sakata, L. Coudreuse, Valéry Ngomo

{"title":"Consideration on Tempering and PWHT Temperatures of C-Mn and Low Alloy Steels Used for the Fabrication of Pressure Vessels: Smart Tuning of Heat Treatment Parameters","authors":"S. Pillot, M. Sakata, L. Coudreuse, Valéry Ngomo","doi":"10.1115/PVP2018-84004","DOIUrl":"https://doi.org/10.1115/PVP2018-84004","url":null,"abstract":"For many years, process licensors and/or end-users have frequently specified that the tempering temperature of C-Mn alloys and low alloy steels (i.e. Cr-Mo, Mn-Mo-Ni alloys) should be greater than the post-weld heat treatments (PWHT). Most of the time, tempering temperature is then required as much as 30°C (54°F) above the PWHT temperature, making it very difficult for steelmakers to be able to supply compliant materials, especially for heavy wall components.\u0000 Application of rules in the applicable codes often leads steelmakers to request for deviations in cases where they become not compatible with material capabilities. This report is intended to illustrate the combined effect of tempering and PWHT on materials properties and to provide recommendations on how to tune smart the tempering treatment with the aim of proposing the most efficient complete heat treatment sequence.\u0000 Data provided within this paper for C-Mn steels and low alloy grades (Cr-Mo and Mn-Mo-Ni alloys) prove that tempering can be performed at temperatures below, at or above one of PWHT without any adverse effect. Data from actual mill production records show that stringent material specifications can be met by steelmakers when they are allowed to tune smartly the heat treatment parameters (tempering temperature) in accordance with applicable construction codes.\u0000 The data also demonstrate that limiting the tempering temperature in the lower range of allowed temperatures may be beneficial to customers as it gives more safety margins for fabrication and maintenance (i.e. potential repairs/modifications) of pressure vessels. It permits either to consider more cycles for PWHT or to perform PWHT at higher temperatures or for longer durations, while on the opposite, current trend imposing high tempering temperatures limits flexibility.","PeriodicalId":428760,"journal":{"name":"Volume 6A: Materials and Fabrication","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125998010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Constraint Assessment for Cruciform Specimens With a Semi-Elliptical Crack 带半椭圆裂纹的十字形试样约束评价

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84427

Yupeng Cao, G. Qian, Yinbiao He, Y. Chao

引用次数: 0

Effect of Constraint Induced by Specimen Geometries on Crack Growth Behavior Under Creep-Fatigue Interaction 蠕变-疲劳交互作用下试样几何约束对裂纹扩展行为的影响

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84816

Lei Zhao, Lianyong Xu

{"title":"Effect of Constraint Induced by Specimen Geometries on Crack Growth Behavior Under Creep-Fatigue Interaction","authors":"Lei Zhao, Lianyong Xu","doi":"10.1115/PVP2018-84816","DOIUrl":"https://doi.org/10.1115/PVP2018-84816","url":null,"abstract":"Creep-fatigue interaction would accelerate the crack growth behaviour and change the crack growth mode, which is different from that presenting in pure creep or fatigue regimes. In addition, the constraint ahead of crack tip affects the relationship between crack growth rate and fracture mechanics and thus affects the accuracy of the life prediction for high-temperature components containing defects. In this study, to reveal the role of constraint caused by various specimen geometries in the creep-fatigue regime, five different types of cracked specimens (including C-ring in tension CST, compact tension CT, single notch tension SENT, single notch bend SENB, middle tension MT) were employed. The crack growth and damage evolution behaviours were simulated using finite element method based on a non-linear creep-fatigue interaction damage model considering creep damage, fatigue damage and interaction damage. The expression of (Ct)avg for different specimen geometries were given. Then, the variation of crack growth behaviour with various specimen geometries under creep-fatigue conditions were analysed. CT and CST showed the highest crack growth rates, which were ten times as the lowest crack growth rates in MT. This revealed that distinctions in specimen geometry influenced the in-plane constraint level ahead of crack tip. Furthermore, a load-independent constraint parameter Q* was introduced to correlate the crack growth rate. The sequence of crack growth rate at a given value of (Ct)avg was same to the reduction of Q*, which shown a linear relation in log-log curve.","PeriodicalId":428760,"journal":{"name":"Volume 6A: Materials and Fabrication","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133463133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toughness Requirement of Chinese Pressure Vessel Steel 07MnNiMoDR Based on Fracture Mechanics Assessment Method 基于断裂力学评价方法的中国压力容器钢07MnNiMoDR韧性要求

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84228

L. Gui, Tong Xu, Yonghui Sun, Xuexin Shang

引用次数: 1

Ductile Tearing Simulation of Circumferential Cracked Pipe Under Cyclic Loading Using Damage Criteria Determined by Monotonic Pipe Test Data 基于单调管道试验数据确定损伤准则的周向裂纹管道循环荷载韧性撕裂模拟

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84588

Jin‐Ha Hwang, Gyogeun Youn, N. Miura, Yun‐Jae Kim

{"title":"Ductile Tearing Simulation of Circumferential Cracked Pipe Under Cyclic Loading Using Damage Criteria Determined by Monotonic Pipe Test Data","authors":"Jin‐Ha Hwang, Gyogeun Youn, N. Miura, Yun‐Jae Kim","doi":"10.1115/PVP2018-84588","DOIUrl":"https://doi.org/10.1115/PVP2018-84588","url":null,"abstract":"To evaluate the structural integrity of nuclear power plant piping, it is important to predict ductile tearing of circumferential cracked pipe from the view point of Leak-Before-Break concept under seismic conditions. CRIEPI (Central Research Institute of Electric Power Industry) conducted fracture test on Japanese carbon steel (STS410) circumferential through-wall cracked pipes under monotonic or cyclic bending load in room temperature. Cyclic loading test conducted variable experimental conditions considering effect of stress ratio and amplitude. In the previous study, monotonic fracture pipe test was simulated by modified stress-strain ductile damage model determined by C(T) specimen fracture toughness test. And, ductile fracture of pipe under cyclic loading simulated using damage criteria based on fracture strain energy from C(T) specimen test data. In this study, monotonic pipe test result is applied to determination of damage model based on fracture strain energy, using finite element analysis, without C(T) specimen fracture toughness test. Ductile fracture of pipe under variable cyclic loading conditions simulates using determined fracture energy damage model from monotonic pipe test.","PeriodicalId":428760,"journal":{"name":"Volume 6A: Materials and Fabrication","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117093825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards an Integrated Computational Model for Additive Manufacturing Process: Heat Source-Particle Interaction and Effective Thermal Conductivity of Powder Bed 增材制造过程的集成计算模型:热源-颗粒相互作用与粉末床的有效导热系数

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84970

Jian Chen, Zhili Feng

引用次数: 0

The Experimental Work in Support to ATLAS+ Project 支持ATLAS+项目的实验工作

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84697

D. Moinereau, P. L. Delliou, A. Dahl, Y. Kayser, S. Szávai, L. Tatár, Tobias Bolinder, M. Serrano, J. Besson, T. Nicak, K. Wallin, S. Marie

{"title":"The Experimental Work in Support to ATLAS+ Project","authors":"D. Moinereau, P. L. Delliou, A. Dahl, Y. Kayser, S. Szávai, L. Tatár, Tobias Bolinder, M. Serrano, J. Besson, T. Nicak, K. Wallin, S. Marie","doi":"10.1115/PVP2018-84697","DOIUrl":"https://doi.org/10.1115/PVP2018-84697","url":null,"abstract":"The 4-years European project ATLAS+ project was launched in June 2017. Its main objective is to develop advanced structural assessment tools to address the remaining technology gaps for the safe and long term operation of nuclear reactor pressure coolant boundary systems.\u0000 The transferability of ductile material properties from small scale fracture mechanics specimens to large scale components is one of the topics of the project. A large programme of experimental work is to be conducted in support of the development and validation of advanced tools for structural integrity assessment within the framework of the work-package 1 (WP 1): Design and execution of simulation oriented experiments to validate models at different scales.\u0000 The experimental work is based on a full set of fracture mechanics experiments conducted on standard specimens and large scale components (several pipes and one mock-up), including a full materials characterization. Three materials are considered:\u0000 • a ferritic steel 15NiCuMoNb5 (WB 36)\u0000 • an aged austenitic stainless steel weld\u0000 • a VVER (eastern PWR) dissimilar metal weld (DMW)\u0000 The paper presents the WP 1, the experimental programme and summarizes the first results.","PeriodicalId":428760,"journal":{"name":"Volume 6A: Materials and Fabrication","volume":"61 21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131370993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison Between Strain-Based and Energy-Based Creep Failure Simulation 基于应变与基于能量的蠕变破坏模拟比较

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84569

S. Kim, Y. Oh, Yun‐Jae Kim

引用次数: 0

Leak Before Break Fracture Assessment for X70 Steel Pressurized Tubes With Axial Surface Crack 带轴向表面裂纹的X70钢加压管断裂前泄漏评价

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-85073

M. El-Sayed, Aly El Domiaty, A. Mourad, M. Lotfy

引用次数: 0

Research on Creep Analysis of Alloy 617 in AUSC Turbine Components 617合金在AUSC涡轮部件中的蠕变分析研究

Volume 6A: Materials and Fabrication Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84227

Yifeng Hu, Lingen Sun, Gang Chen

引用次数: 0