{"id":"https://openalex.org/A5012000299","orcid":"https://orcid.org/0000-0001-6982-0734","observed_orcids":["https://orcid.org/0000-0001-6982-0734"],"display_name":"Jan Grajczak","raw_author_names":["J. Grajczak","Jan Grajczak"],"full_name":"Jan Grajczak","works_count":16,"cited_by_count":90,"summary_stats":{"2yr_mean_citedness":0.5,"h_index":6,"i10_index":2},"ids":{"openalex":"https://openalex.org/A5012000299","orcid":"https://orcid.org/0000-0001-6982-0734","observed_orcids":["https://orcid.org/0000-0001-6982-0734"]},"affiliations":[{"institution":{"id":"https://openalex.org/I4210102034","ror":"https://ror.org/01gkym270","display_name":"Laser Zentrum Hannover","country_code":"DE","type":"nonprofit","lineage":["https://openalex.org/I4210102034"]},"years":[2026,2024,2023,2022,2021,2020]}],"last_known_institutions":[{"id":"https://openalex.org/I4210102034","ror":"https://ror.org/01gkym270","display_name":"Laser Zentrum Hannover","country_code":"DE","type":"nonprofit","lineage":["https://openalex.org/I4210102034"]}],"topics":[{"id":"https://openalex.org/T10723","display_name":"Advanced Welding Techniques Analysis","count":12,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10834","display_name":"Welding Techniques and Residual Stresses","count":11,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10705","display_name":"Additive Manufacturing Materials and Processes","count":9,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10662","display_name":"Ultrasonics and Acoustic Wave Propagation","count":2,"subfield":{"id":"https://openalex.org/subfields/2211","display_name":"Mechanics of Materials"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10700","display_name":"Metal Forming Simulation Techniques","count":2,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10723","display_name":"Advanced Welding Techniques Analysis","value":4.73e-05,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10705","display_name":"Additive Manufacturing Materials and Processes","value":4.71e-05,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10834","display_name":"Welding Techniques and Residual Stresses","value":3.68e-05,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11525","display_name":"Piezoelectric Actuators and Control","value":2.57e-05,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13965","display_name":"Laser and Thermal Forming Techniques","value":2.28e-05,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"19474535","wikidata":"https://www.wikidata.org/wiki/Q131172","display_name":"Welding","score":0.9245657920837402},{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.9057568907737732},{"id":"89344249","wikidata":"https://www.wikidata.org/wiki/Q937468","display_name":"Laser beam welding","score":0.7978000044822693},{"id":"24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","score":0.5275999903678894},{"id":"159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","score":0.5239712595939636}],"counts_by_year":[{"year":2020,"works_count":2,"oa_works_count":2,"cited_by_count":10},{"year":2021,"works_count":2,"oa_works_count":1,"cited_by_count":34},{"year":2022,"works_count":4,"oa_works_count":3,"cited_by_count":30},{"year":2023,"works_count":2,"oa_works_count":2,"cited_by_count":13},{"year":2024,"works_count":2,"oa_works_count":2,"cited_by_count":3},{"year":2026,"works_count":4,"oa_works_count":3,"cited_by_count":0}],"display_name_alternatives":["J. Grajczak","Jan Grajczak"],"block_key":"j grajczak","works_api_url":"https://api.openalex.org/works?filter=author.id:A5012000299","updated_date":"2026-10-12T12:34:37","created_date":"2025-10-10T00:00:00"}