IIW 2017 Annual Report

C-VI / Terminology / Dr Glenn Ziegenfuss , Execu- tive Director retired for the Standards Engineering Society – USA

C-IX / Behaviour of Metals Subjected to Welding / Dr Hee Jin Kim – Republic of Korea We continued our focus on the relationship between composition and weld microstructure, and between weld microstructure and properties in various alloys, namely high-strength steels, stainless steels and nickel-base alloys, creep-re- sistant alloys and non-ferrous alloys. With increa- sing interest in stainless steels, duplex stainless steels and nickel-base alloys, particularly in the areas of solidification and ductility-dip cracking, extended meetings are planned. Additive manu- facturing of Al-alloy by friction welding was in- troduced as a topic this year. Joint meetings with other Commissions facilitated expert discussion on a wide range of materials and their micros- tructural behaviour when welded. C-X / Structural Performances of Welded Joints - Fracture Avoidance / Prof. Dr- Eng. Fumiyoshi Minami, Director, Joining & Welding Research Institute (JWRI), Osaka University - Japan

Our group of informa- tion technology experts primarily develops da- tabases of terms and definitions for use by the joining industries. It has partnered with ISO/TC 44 SC 7 on a series of parts for ISO/TR 25901 Welding

and allied processes -- Vocabulary covering all of the major welding and cutting technical areas. Our current activity is developing controlled ter- minology for health and safety, laser welding, and thermal cutting in liaison with the appropriate technical Commissions. C-VII / Microjoining and Nanojoining / Prof. Akio Hirose , Prof. At Osaka University - Japan This newly established Commission, based on the previous fast-growing Select Committee-Micro, has enjoyed a huge success in 2017. There were around 80 presentations and posters in six half-day sessions at the Annual Assembly and International Conference, including a joint meeting with C-XVIII and participation in a C-VII workshop. Topics of interest include: applied microjoining and nano- joining processes; materials for nano-particles and –layers; quality assessment of joints; and funda- mental issues in microjoining and nanojoining. C-VIII / Health, Safety and Environment / M.D. Ph.D. Wolfgang Zschiesche – Germany

Experts in our group collaborate to establish practical procedures for assessing the strength and integrity of welded structures through de- sign, and their fitness- for-service (FFS) with known or assumed

flaws. Our recent activity is focused on two sub- jects. Firstly, the development of FFS procedures for fracture assessment of weld components. Good progress has beenmade in crack tip opening displacement (CTOD) assessment procedures and FFS under seismic conditions. Secondly, work is ongoing on a compendium of residual stress pro- files for thick weld components. C-XI / Pressure Vessels, Boilers and Pipelines / Mrs Teresa Melfi , Technical Fellow, R&D, the Lin- coln Electric Co. - USA

Assessment of global developments in welding WHS continued to be a focus, along with the publication of research outcomes and expert opinion to ensure indus- try is well informed by IIW on current issues and

Our meetings focused on some of the most pres- sing material issues in the reliability and cost of pipelines and pressure vessels produced using low alloy, stainless, and creep strength enhanced ferritic steels. High pro-

solutions. There was significant discussion and participation in the International Agency for Re- search on Cancer re-evaluation of welding fumes as carcinogens. Similarly the significant reduction of occupational limit values for metals and their compounds in many countries was discussed as a serious challenge for industries utilising welding. Other discussion topics included: spinel character of welding fumes; carbon monoxide from shiel- ding gas; and teflon on wire consumables.

ductivity welding processes were addressed, including their effect on material properties,

13 ANNUAL REPORT 2017 - IIW